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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Version linux-6.11.5) and /Makefile (Version linux-4.16.18)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 VERSION = 6                                    !!   2 VERSION = 4
  3 PATCHLEVEL = 11                                !!   3 PATCHLEVEL = 16
  4 SUBLEVEL = 5                                   !!   4 SUBLEVEL = 18
  5 EXTRAVERSION =                                      5 EXTRAVERSION =
  6 NAME = Baby Opossum Posse                      !!   6 NAME = Fearless Coyote
  7                                                     7 
  8 # *DOCUMENTATION*                                   8 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      9 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README             10 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     11 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     12 # expect to learn how to build the kernel reading this file.
 13                                                    13 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     !!  14 # That's our default target when none is given on the command line
 15 $(error GNU Make >= 4.0 is required. Your Make !!  15 PHONY := _all
 16 endif                                          !!  16 _all:
 17                                                    17 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \         !!  18 # o Do not use make's built-in rules and variables
 19         $(error targets prefixed with '__' are !!  19 #   (this increases performance and avoids hard-to-debug behaviour);
                                                   >>  20 # o Look for make include files relative to root of kernel src
                                                   >>  21 MAKEFLAGS += -rR --include-dir=$(CURDIR)
 20                                                    22 
 21 # That's our default target when none is given !!  23 # Avoid funny character set dependencies
 22 PHONY := __all                                 !!  24 unexport LC_ALL
 23 __all:                                         !!  25 LC_COLLATE=C
                                                   >>  26 LC_NUMERIC=C
                                                   >>  27 export LC_COLLATE LC_NUMERIC
                                                   >>  28 
                                                   >>  29 # Avoid interference with shell env settings
                                                   >>  30 unexport GREP_OPTIONS
 24                                                    31 
 25 # We are using a recursive build, so we need t     32 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       33 # to get the ordering right.
 27 #                                                  34 #
 28 # Most importantly: sub-Makefiles should only      35 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     36 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      37 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ !!  38 # unavoidable when linking the built-in.o targets which finally
 32 # turn into vmlinux), we will call a sub make      39 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     40 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               41 # is now up to date.
 35 #                                                  42 #
 36 # The only cases where we need to modify files     43 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     44 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     45 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    46 # prepare rule.
 40                                                    47 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                     << 
 46                                                << 
 47 # Do not use make's built-in rules and variabl << 
 48 # (this increases performance and avoids hard- << 
 49 MAKEFLAGS += -rR                               << 
 50                                                << 
 51 # Avoid funny character set dependencies       << 
 52 unexport LC_ALL                                << 
 53 LC_COLLATE=C                                   << 
 54 LC_NUMERIC=C                                   << 
 55 export LC_COLLATE LC_NUMERIC                   << 
 56                                                << 
 57 # Avoid interference with shell env settings   << 
 58 unexport GREP_OPTIONS                          << 
 59                                                << 
 60 # Beautify output                                  48 # Beautify output
 61 # --------------------------------------------     49 # ---------------------------------------------------------------------------
 62 #                                                  50 #
 63 # Most of build commands in Kbuild start with  !!  51 # Normally, we echo the whole command before executing it. By making
 64 # "quiet_cmd_*". If defined, the short log is  !!  52 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 65 # that command is printed by default.          !!  53 # $(quiet) to choose other forms of output instead, e.g.
 66 #                                              !!  54 #
 67 # e.g.)                                        !!  55 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      !!  56 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 69 #          cmd_depmod = $(srctree)/scripts/dep !!  57 #
                                                   >>  58 # If $(quiet) is empty, the whole command will be printed.
                                                   >>  59 # If it is set to "quiet_", only the short version will be printed.
                                                   >>  60 # If it is set to "silent_", nothing will be printed at all, since
                                                   >>  61 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 70 #                                                  62 #
 71 # A simple variant is to prefix commands with      63 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     64 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  65 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        !!  66 #       $(Q)ln $@ :<
 75 #                                                  67 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm !!  68 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 77 # If KBUILD_VERBOSE contains 2, the reason for !!  69 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 78 #                                                  70 #
 79 # To put more focus on warnings, be less verbo     71 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          72 # Use 'make V=1' to see the full commands
 81                                                    73 
 82 ifeq ("$(origin V)", "command line")               74 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            75   KBUILD_VERBOSE = $(V)
 84 endif                                              76 endif
                                                   >>  77 ifndef KBUILD_VERBOSE
                                                   >>  78   KBUILD_VERBOSE = 0
                                                   >>  79 endif
 85                                                    80 
 86 quiet = quiet_                                 !!  81 ifeq ($(KBUILD_VERBOSE),1)
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                          82   quiet =
 91   Q =                                              83   Q =
                                                   >>  84 else
                                                   >>  85   quiet=quiet_
                                                   >>  86   Q = @
 92 endif                                              87 endif
 93                                                    88 
 94 # If the user is running make -s (silent mode)     89 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         90 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !!  91 
 97 quiet=silent_                                  !!  92 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
 98 override KBUILD_VERBOSE :=                     !!  93   quiet=silent_
                                                   >>  94   tools_silent=s
 99 endif                                              95 endif
100                                                    96 
101 export quiet Q KBUILD_VERBOSE                      97 export quiet Q KBUILD_VERBOSE
102                                                    98 
103 # Call a source code checker (by default, "spa !!  99 # kbuild supports saving output files in a separate directory.
104 # C compilation.                               !! 100 # To locate output files in a separate directory two syntaxes are supported.
                                                   >> 101 # In both cases the working directory must be the root of the kernel src.
                                                   >> 102 # 1) O=
                                                   >> 103 # Use "make O=dir/to/store/output/files/"
105 #                                                 104 #
106 # Use 'make C=1' to enable checking of only re !! 105 # 2) Set KBUILD_OUTPUT
107 # Use 'make C=2' to enable checking of *all* s !! 106 # Set the environment variable KBUILD_OUTPUT to point to the directory
108 # of whether they are re-compiled or not.      !! 107 # where the output files shall be placed.
                                                   >> 108 # export KBUILD_OUTPUT=dir/to/store/output/files/
                                                   >> 109 # make
109 #                                                 110 #
110 # See the file "Documentation/dev-tools/sparse !! 111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
111 # including where to get the "sparse" utility. !! 112 # variable.
112                                                << 
113 ifeq ("$(origin C)", "command line")           << 
114   KBUILD_CHECKSRC = $(C)                       << 
115 endif                                          << 
116 ifndef KBUILD_CHECKSRC                         << 
117   KBUILD_CHECKSRC = 0                          << 
118 endif                                          << 
119                                                   113 
120 export KBUILD_CHECKSRC                         !! 114 # KBUILD_SRC is not intended to be used by the regular user (for now),
                                                   >> 115 # it is set on invocation of make with KBUILD_OUTPUT or O= specified.
                                                   >> 116 ifeq ($(KBUILD_SRC),)
121                                                   117 
122 # Enable "clippy" (a linter) as part of the Ru !! 118 # OK, Make called in directory where kernel src resides
123 #                                              !! 119 # Do we want to locate output files in a separate directory?
124 # Use 'make CLIPPY=1' to enable it.            !! 120 ifeq ("$(origin O)", "command line")
125 ifeq ("$(origin CLIPPY)", "command line")      !! 121   KBUILD_OUTPUT := $(O)
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                             122 endif
128                                                   123 
129 export KBUILD_CLIPPY                           !! 124 # Cancel implicit rules on top Makefile
                                                   >> 125 $(CURDIR)/Makefile Makefile: ;
130                                                   126 
131 # Use make M=dir or set the environment variab !! 127 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
132 # directory of external module to build. Setti !! 128   $(error main directory cannot contain spaces nor colons)
133 ifeq ("$(origin M)", "command line")           << 
134   KBUILD_EXTMOD := $(M)                        << 
135 endif                                             129 endif
136                                                   130 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \            !! 131 ifneq ($(KBUILD_OUTPUT),)
138         $(error building multiple external mod !! 132 # check that the output directory actually exists
                                                   >> 133 saved-output := $(KBUILD_OUTPUT)
                                                   >> 134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
                                                   >> 135                                                                 && pwd)
                                                   >> 136 $(if $(KBUILD_OUTPUT),, \
                                                   >> 137      $(error failed to create output directory "$(saved-output)"))
139                                                   138 
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI !! 139 PHONY += $(MAKECMDGOALS) sub-make
141         $(error module directory path cannot c << 
142                                                   140 
143 # Remove trailing slashes                      !! 141 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)        !! 142         @:
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM << 
146 endif                                          << 
147                                                   143 
148 export KBUILD_EXTMOD                           !! 144 # Invoke a second make in the output directory, passing relevant variables
                                                   >> 145 sub-make:
                                                   >> 146         $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
                                                   >> 147         -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
149                                                   148 
150 # backward compatibility                       !! 149 # Leave processing to above invocation of make
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC !! 150 skip-makefile := 1
                                                   >> 151 endif # ifneq ($(KBUILD_OUTPUT),)
                                                   >> 152 endif # ifeq ($(KBUILD_SRC),)
152                                                   153 
153 ifeq ("$(origin W)", "command line")           !! 154 # We process the rest of the Makefile if this is the final invocation of make
154   KBUILD_EXTRA_WARN := $(W)                    !! 155 ifeq ($(skip-makefile),)
155 endif                                          << 
156                                                   156 
157 export KBUILD_EXTRA_WARN                       !! 157 # Do not print "Entering directory ...",
                                                   >> 158 # but we want to display it when entering to the output directory
                                                   >> 159 # so that IDEs/editors are able to understand relative filenames.
                                                   >> 160 MAKEFLAGS += --no-print-directory
158                                                   161 
159 # Kbuild will save output files in the current !! 162 # Call a source code checker (by default, "sparse") as part of the
160 # This does not need to match to the root of t !! 163 # C compilation.
161 #                                              << 
162 # For example, you can do this:                << 
163 #                                              << 
164 #  cd /dir/to/store/output/files; make -f /dir << 
165 #                                              << 
166 # If you want to save output files in a differ << 
167 # two syntaxes to specify it.                  << 
168 #                                              << 
169 # 1) O=                                        << 
170 # Use "make O=dir/to/store/output/files/"      << 
171 #                                                 164 #
172 # 2) Set KBUILD_OUTPUT                         !! 165 # Use 'make C=1' to enable checking of only re-compiled files.
173 # Set the environment variable KBUILD_OUTPUT t !! 166 # Use 'make C=2' to enable checking of *all* source files, regardless
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 167 # of whether they are re-compiled or not.
175 #                                                 168 #
176 # The O= assignment takes precedence over the  !! 169 # See the file "Documentation/dev-tools/sparse.rst" for more details,
177 # variable.                                    !! 170 # including where to get the "sparse" utility.
178                                                   171 
179 # Do we want to change the working directory?  !! 172 ifeq ("$(origin C)", "command line")
180 ifeq ("$(origin O)", "command line")           !! 173   KBUILD_CHECKSRC = $(C)
181   KBUILD_OUTPUT := $(O)                        << 
182 endif                                             174 endif
183                                                !! 175 ifndef KBUILD_CHECKSRC
184 ifneq ($(KBUILD_OUTPUT),)                      !! 176   KBUILD_CHECKSRC = 0
185 # $(realpath ...) gets empty if the path does  << 
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           << 
187 # $(realpath ...) resolves symlinks            << 
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    << 
189 $(if $(abs_objtree),,$(error failed to create  << 
190 endif # ifneq ($(KBUILD_OUTPUT),)              << 
191                                                << 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 << 
193 $(error source directory cannot contain spaces << 
194 endif                                             177 endif
195                                                   178 
196 export sub_make_done := 1                      !! 179 # Use make M=dir to specify directory of external module to build
197                                                !! 180 # Old syntax make ... SUBDIRS=$PWD is still supported
198 endif # sub_make_done                          !! 181 # Setting the environment variable KBUILD_EXTMOD take precedence
199                                                !! 182 ifdef SUBDIRS
200 ifeq ($(abs_objtree),$(CURDIR))                !! 183   KBUILD_EXTMOD ?= $(SUBDIRS)
201 # Suppress "Entering directory ..." if we are  << 
202 no-print-directory := --no-print-directory     << 
203 else                                           << 
204 # Recursion to show "Entering directory ..."   << 
205 need-sub-make := 1                             << 
206 endif                                             184 endif
207                                                   185 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 186 ifeq ("$(origin M)", "command line")
209 # If --no-print-directory is unset, recurse on !! 187   KBUILD_EXTMOD := $(M)
210 # You may end up recursing into __sub-make twi << 
211 # behavior change in GNU Make 4.4.1.           << 
212 need-sub-make := 1                             << 
213 endif                                             188 endif
214                                                   189 
215 ifeq ($(need-sub-make),1)                      !! 190 ifeq ($(KBUILD_SRC),)
216                                                << 
217 PHONY += $(MAKECMDGOALS) __sub-make            << 
218                                                << 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) << 
220         @:                                     << 
221                                                << 
222 # Invoke a second make in the output directory << 
223 __sub-make:                                    << 
224         $(Q)$(MAKE) $(no-print-directory) -C $ << 
225         -f $(abs_srctree)/Makefile $(MAKECMDGO << 
226                                                << 
227 else # need-sub-make                           << 
228                                                << 
229 # We process the rest of the Makefile if this  << 
230                                                << 
231 ifeq ($(abs_srctree),$(abs_objtree))           << 
232         # building in the source tree             191         # building in the source tree
233         srctree := .                              192         srctree := .
234         building_out_of_srctree :=             << 
235 else                                              193 else
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt !! 194         ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
237                 # building in a subdirectory o    195                 # building in a subdirectory of the source tree
238                 srctree := ..                     196                 srctree := ..
239         else                                      197         else
240                 srctree := $(abs_srctree)      !! 198                 srctree := $(KBUILD_SRC)
241         endif                                     199         endif
242         building_out_of_srctree := 1           << 
243 endif                                             200 endif
244                                                   201 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                 !! 202 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
246 srctree := $(abs_srctree)                      << 
247 endif                                          << 
248                                                   203 
249 objtree         := .                              204 objtree         := .
                                                   >> 205 src             := $(srctree)
                                                   >> 206 obj             := $(objtree)
250                                                   207 
251 VPATH           :=                             !! 208 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
252                                                   209 
253 ifeq ($(KBUILD_EXTMOD),)                       !! 210 export srctree objtree VPATH
254 ifdef building_out_of_srctree                  << 
255 VPATH           := $(srctree)                  << 
256 endif                                          << 
257 endif                                          << 
258                                                << 
259 export building_out_of_srctree srctree objtree << 
260                                                   211 
261 # To make sure we do not include .config for a    212 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri    213 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c    214 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets.       215 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'.               216 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and     217 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c    218 # of make so .config is not included in this case either (for *config).
268                                                   219 
269 version_h := include/generated/uapi/linux/vers    220 version_h := include/generated/uapi/linux/version.h
                                                   >> 221 old_version_h := include/linux/version.h
270                                                   222 
271 clean-targets := %clean mrproper cleandocs     !! 223 no-dot-config-targets := clean mrproper distclean \
272 no-dot-config-targets := $(clean-targets) \    << 
273                          cscope gtags TAGS tag    224                          cscope gtags TAGS tags help% %docs check% coccicheck \
274                          $(version_h) headers  !! 225                          $(version_h) headers_% archheaders archscripts \
275                          %asm-generic kernelve !! 226                          kernelversion %src-pkg
276                          outputmakefile rustav << 
277 no-sync-config-targets := $(no-dot-config-targ << 
278                           image_name           << 
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 
280                                                << 
281 config-build    :=                             << 
282 mixed-build     :=                             << 
283 need-config     := 1                           << 
284 may-sync-config := 1                           << 
285 single-build    :=                             << 
286                                                << 
287 ifneq ($(filter $(no-dot-config-targets), $(MA << 
288     ifeq ($(filter-out $(no-dot-config-targets << 
289         need-config :=                         << 
290     endif                                      << 
291 endif                                          << 
292                                                << 
293 ifneq ($(filter $(no-sync-config-targets), $(M << 
294     ifeq ($(filter-out $(no-sync-config-target << 
295         may-sync-config :=                     << 
296     endif                                      << 
297 endif                                          << 
298                                                   227 
299 need-compiler := $(may-sync-config)            !! 228 config-targets := 0
                                                   >> 229 mixed-targets  := 0
                                                   >> 230 dot-config     := 1
300                                                   231 
301 ifneq ($(KBUILD_EXTMOD),)                      !! 232 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
302     may-sync-config :=                         !! 233         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
                                                   >> 234                 dot-config := 0
                                                   >> 235         endif
303 endif                                             236 endif
304                                                   237 
305 ifeq ($(KBUILD_EXTMOD),)                          238 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 239         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307         config-build := 1                      !! 240                 config-targets := 1
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 241                 ifneq ($(words $(MAKECMDGOALS)),1)
309             mixed-build := 1                   !! 242                         mixed-targets := 1
                                                   >> 243                 endif
310         endif                                     244         endif
311     endif                                      << 
312 endif                                          << 
313                                                << 
314 # We cannot build single targets and the other << 
315 ifneq ($(filter $(single-targets), $(MAKECMDGO << 
316     single-build := 1                          << 
317     ifneq ($(filter-out $(single-targets), $(M << 
318         mixed-build := 1                       << 
319     endif                                      << 
320 endif                                          << 
321                                                << 
322 # For "make -j clean all", "make -j mrproper d << 
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL << 
324     ifneq ($(filter-out $(clean-targets),$(MAK << 
325         mixed-build := 1                       << 
326     endif                                      << 
327 endif                                             245 endif
328                                                << 
329 # install and modules_install need also be pro    246 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        247 ifneq ($(filter install,$(MAKECMDGOALS)),)
331     ifneq ($(filter modules_install,$(MAKECMDG !! 248         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332         mixed-build := 1                       !! 249                 mixed-targets := 1
333     endif                                      !! 250         endif
334 endif                                             251 endif
335                                                   252 
336 ifdef mixed-build                              !! 253 ifeq ($(mixed-targets),1)
337 # ============================================    254 # ===========================================================================
338 # We're called with mixed targets (*config and    255 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one.                         256 # Handle them one by one.
340                                                   257 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       258 PHONY += $(MAKECMDGOALS) __build_one_by_one
342                                                   259 
343 $(MAKECMDGOALS): __build_one_by_one            !! 260 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344         @:                                        261         @:
345                                                   262 
346 __build_one_by_one:                               263 __build_one_by_one:
347         $(Q)set -e; \                             264         $(Q)set -e; \
348         for i in $(MAKECMDGOALS); do \            265         for i in $(MAKECMDGOALS); do \
349                 $(MAKE) -f $(srctree)/Makefile    266                 $(MAKE) -f $(srctree)/Makefile $$i; \
350         done                                      267         done
351                                                   268 
352 else # !mixed-build                            !! 269 else
353                                                   270 
354 include $(srctree)/scripts/Kbuild.include      !! 271 # We need some generic definitions (do not try to remake the file).
                                                   >> 272 scripts/Kbuild.include: ;
                                                   >> 273 include scripts/Kbuild.include
355                                                   274 
356 # Read KERNELRELEASE from include/config/kerne    275 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 276 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    277 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    278 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360                                                   279 
361 include $(srctree)/scripts/subarch.include     !! 280 # SUBARCH tells the usermode build what the underlying arch is.  That is set
                                                   >> 281 # first, and if a usermode build is happening, the "ARCH=um" on the command
                                                   >> 282 # line overrides the setting of ARCH below.  If a native build is happening,
                                                   >> 283 # then ARCH is assigned, getting whatever value it gets normally, and
                                                   >> 284 # SUBARCH is subsequently ignored.
                                                   >> 285 
                                                   >> 286 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
                                                   >> 287                                   -e s/sun4u/sparc64/ \
                                                   >> 288                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
                                                   >> 289                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                                   >> 290                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                                   >> 291                                   -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
                                                   >> 292                                   -e s/riscv.*/riscv/)
362                                                   293 
363 # Cross compiling and selecting different set     294 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    295 # ---------------------------------------------------------------------------
365 #                                                 296 #
366 # When performing cross compilation for other     297 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     298 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      299 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 300 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    301 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    302 # The default ARCH is the host where make is executed.
372                                                   303 
373 # CROSS_COMPILE specify the prefix used for al    304 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    305 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             306 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    307 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 308 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    309 # Alternatively CROSS_COMPILE can be set in the environment.
                                                   >> 310 # A third alternative is to store a setting in .config so that plain
                                                   >> 311 # "make" in the configured kernel build directory always uses that.
379 # Default value for CROSS_COMPILE is not to pr    312 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    313 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     314 ARCH            ?= $(SUBARCH)
                                                   >> 315 CROSS_COMPILE   ?= $(CONFIG_CROSS_COMPILE:"%"=%)
382                                                   316 
383 # Architecture as present in compile.h            317 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        318 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        319 SRCARCH         := $(ARCH)
386                                                   320 
387 # Additional ARCH settings for x86                321 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               322 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            323         SRCARCH := x86
390 endif                                             324 endif
391 ifeq ($(ARCH),x86_64)                             325 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            326         SRCARCH := x86
393 endif                                             327 endif
394                                                   328 
395 # Additional ARCH settings for sparc              329 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            330 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           331        SRCARCH := sparc
398 endif                                             332 endif
399 ifeq ($(ARCH),sparc64)                            333 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           334        SRCARCH := sparc
401 endif                                             335 endif
402                                                   336 
403 # Additional ARCH settings for parisc          !! 337 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64)                        !! 338 ifeq ($(ARCH),sh64)
405        SRCARCH := parisc                       !! 339        SRCARCH := sh
406 endif                                             340 endif
407                                                   341 
408 export cross_compiling :=                      !! 342 # Additional ARCH settings for tile
409 ifneq ($(SRCARCH),$(SUBARCH))                  !! 343 ifeq ($(ARCH),tilepro)
410 cross_compiling := 1                           !! 344        SRCARCH := tile
                                                   >> 345 endif
                                                   >> 346 ifeq ($(ARCH),tilegx)
                                                   >> 347        SRCARCH := tile
411 endif                                             348 endif
412                                                   349 
413 KCONFIG_CONFIG  ?= .config                        350 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             351 export KCONFIG_CONFIG
415                                                   352 
416 # SHELL used by kbuild                            353 # SHELL used by kbuild
417 CONFIG_SHELL := sh                             !! 354 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
418                                                !! 355           else if [ -x /bin/bash ]; then echo /bin/bash; \
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS  !! 356           else echo sh; fi ; fi)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 357 
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 358 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
422                                                !! 359 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
423 ifneq ($(LLVM),)                               !! 360 HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
424 ifneq ($(filter %/,$(LLVM)),)                  !! 361 
425 LLVM_PREFIX := $(LLVM)                         !! 362 HOSTCC       = gcc
426 else ifneq ($(filter -%,$(LLVM)),)             !! 363 HOSTCXX      = g++
427 LLVM_SUFFIX := $(LLVM)                         !! 364 HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
428 endif                                          !! 365                 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
429                                                !! 366 HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)    !! 367 HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)  !! 368 HOST_LOADLIBES := $(HOST_LFS_LIBS)
432 else                                           << 
433 HOSTCC  = gcc                                  << 
434 HOSTCXX = g++                                  << 
435 endif                                          << 
436 HOSTRUSTC = rustc                              << 
437 HOSTPKG_CONFIG  = pkg-config                   << 
438                                                << 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto << 
440                          -O2 -fomit-frame-poin << 
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) << 
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           << 
443                                                << 
444 # These flags apply to all Rust code in the tr << 
445 # host programs.                               << 
446 export rust_common_flags := --edition=2021 \   << 
447                             -Zbinary_dep_depin << 
448                             -Astable_features  << 
449                             -Dunsafe_op_in_uns << 
450                             -Dnon_ascii_idents << 
451                             -Wrust_2018_idioms << 
452                             -Wunreachable_pub  << 
453                             -Wmissing_docs \   << 
454                             -Wrustdoc::missing << 
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H << 
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST << 
470                                                   369 
471 # Make variables (CC, etc...)                     370 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                     !! 371 AS              = $(CROSS_COMPILE)as
473 ifneq ($(LLVM),)                               << 
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU << 
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S << 
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ << 
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ << 
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( << 
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( << 
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( << 
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL << 
482 else                                           << 
483 CC              = $(CROSS_COMPILE)gcc          << 
484 LD              = $(CROSS_COMPILE)ld              372 LD              = $(CROSS_COMPILE)ld
                                                   >> 373 CC              = $(CROSS_COMPILE)gcc
                                                   >> 374 CPP             = $(CC) -E
485 AR              = $(CROSS_COMPILE)ar              375 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              376 NM              = $(CROSS_COMPILE)nm
                                                   >> 377 STRIP           = $(CROSS_COMPILE)strip
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         378 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         379 OBJDUMP         = $(CROSS_COMPILE)objdump
489 READELF         = $(CROSS_COMPILE)readelf      << 
490 STRIP           = $(CROSS_COMPILE)strip        << 
491 endif                                          << 
492 RUSTC           = rustc                        << 
493 RUSTDOC         = rustdoc                      << 
494 RUSTFMT         = rustfmt                      << 
495 CLIPPY_DRIVER   = clippy-driver                << 
496 BINDGEN         = bindgen                      << 
497 PAHOLE          = pahole                       << 
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve << 
499 LEX             = flex                            380 LEX             = flex
500 YACC            = bison                           381 YACC            = bison
501 AWK             = awk                             382 AWK             = awk
                                                   >> 383 GENKSYMS        = scripts/genksyms/genksyms
502 INSTALLKERNEL  := installkernel                   384 INSTALLKERNEL  := installkernel
                                                   >> 385 DEPMOD          = /sbin/depmod
503 PERL            = perl                            386 PERL            = perl
504 PYTHON3         = python3                      !! 387 PYTHON          = python
505 CHECK           = sparse                          388 CHECK           = sparse
506 BASH            = bash                         << 
507 KGZIP           = gzip                         << 
508 KBZIP2          = bzip2                        << 
509 KLZOP           = lzop                         << 
510 LZMA            = lzma                         << 
511 LZ4             = lz4c                         << 
512 XZ              = xz                           << 
513 ZSTD            = zstd                         << 
514                                                   389 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    390 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void -    391                   -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS :=                              !! 392 NOSTDINC_FLAGS  =
518 CFLAGS_MODULE   =                                 393 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                             << 
520 AFLAGS_MODULE   =                                 394 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 395 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 396 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 397 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 398 LDFLAGS_vmlinux =
526                                                   399 
527 # Use USERINCLUDE when you must reference the     400 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               401 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i    402                 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i    403                 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       404                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    405                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li << 
534                 -include $(srctree)/include/li    406                 -include $(srctree)/include/linux/kconfig.h
535                                                   407 
536 # Use LINUXINCLUDE when you must reference the    408 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      409 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              410 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i    411                 -I$(srctree)/arch/$(SRCARCH)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i    412                 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541                 $(if $(building_out_of_srctree !! 413                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
542                 -I$(objtree)/include \            414                 -I$(objtree)/include \
543                 $(USERINCLUDE)                    415                 $(USERINCLUDE)
544                                                   416 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE     !! 417 KBUILD_AFLAGS   := -D__ASSEMBLY__
546                                                !! 418 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS :=                               !! 419                    -fno-strict-aliasing -fno-common -fshort-wchar \
548 KBUILD_CFLAGS += -std=gnu11                    !! 420                    -Werror-implicit-function-declaration \
549 KBUILD_CFLAGS += -fshort-wchar                 !! 421                    -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char               !! 422                    -std=gnu89
551 KBUILD_CFLAGS += -fno-common                   << 
552 KBUILD_CFLAGS += -fno-PIE                      << 
553 KBUILD_CFLAGS += -fno-strict-aliasing          << 
554                                                << 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   423 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \     << 
557                     -Cpanic=abort -Cembed-bitc << 
558                     -Cforce-unwind-tables=n -C << 
559                     -Csymbol-mangling-version= << 
560                     -Crelocation-model=static  << 
561                     -Zfunction-sections=n \    << 
562                     -Wclippy::float_arithmetic << 
563                                                << 
564 KBUILD_AFLAGS_KERNEL :=                           424 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           425 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                     << 
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 426 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 427 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        !! 428 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
570 KBUILD_LDFLAGS_MODULE :=                       !! 429 GCC_PLUGINS_CFLAGS :=
571 KBUILD_LDFLAGS :=                              << 
572 CLANG_FLAGS :=                                 << 
573                                                << 
574 ifeq ($(KBUILD_CLIPPY),1)                      << 
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY        << 
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)     << 
577 else                                           << 
578         RUSTC_OR_CLIPPY_QUIET := RUSTC         << 
579         RUSTC_OR_CLIPPY = $(RUSTC)             << 
580 endif                                          << 
581                                                << 
582 ifdef RUST_LIB_SRC                             << 
583         export RUST_LIB_SRC                    << 
584 endif                                          << 
585                                                   430 
586 # Allows the usage of unstable features in sta !! 431 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
587 export RUSTC_BOOTSTRAP := 1                    !! 432 export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
                                                   >> 433 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
                                                   >> 434 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
588                                                   435 
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 436 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          << 
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF << 
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ << 
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD     << 
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS  << 
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    << 
597                                                << 
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC << 
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    437 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 438 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    439 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 440 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 441 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
                                                   >> 442 export KBUILD_ARFLAGS
                                                   >> 443 
                                                   >> 444 # When compiling out-of-tree modules, put MODVERDIR in the module
                                                   >> 445 # tree rather than in the kernel tree. The kernel tree might
                                                   >> 446 # even be read-only.
                                                   >> 447 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
604                                                   448 
605 # Files to ignore in find ... statements          449 # Files to ignore in find ... statements
606                                                   450 
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na    451 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
608                           -name CVS -o -name .    452                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609                           -prune -o               453                           -prune -o
                                                   >> 454 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
                                                   >> 455                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
610                                                   456 
611 # ============================================    457 # ===========================================================================
612 # Rules shared between *config targets and bui    458 # Rules shared between *config targets and build targets
613                                                   459 
614 # Basic helpers built in scripts/basic/           460 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic                            461 PHONY += scripts_basic
616 scripts_basic:                                    462 scripts_basic:
617         $(Q)$(MAKE) $(build)=scripts/basic        463         $(Q)$(MAKE) $(build)=scripts/basic
                                                   >> 464         $(Q)rm -f .tmp_quiet_recordmcount
                                                   >> 465 
                                                   >> 466 # To avoid any implicit rule to kick in, define an empty command.
                                                   >> 467 scripts/basic/%: scripts_basic ;
618                                                   468 
619 PHONY += outputmakefile                           469 PHONY += outputmakefile
620 ifdef building_out_of_srctree                  << 
621 # Before starting out-of-tree build, make sure << 
622 # outputmakefile generates a Makefile in the o    470 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve    471 # separate output directory. This allows convenient use of make in the
624 # output directory.                               472 # output directory.
625 # At the same time when output Makefile genera << 
626 # ignore whole output directory                << 
627                                                << 
628 quiet_cmd_makefile = GEN     Makefile          << 
629       cmd_makefile = { \                       << 
630         echo "\# Automatically generated by $( << 
631         echo "include $(srctree)/Makefile"; \  << 
632         } > Makefile                           << 
633                                                << 
634 outputmakefile:                                   473 outputmakefile:
635         @if [ -f $(srctree)/.config -o \       !! 474 ifneq ($(KBUILD_SRC),)
636                  -d $(srctree)/include/config  << 
637                  -d $(srctree)/arch/$(SRCARCH) << 
638                 echo >&2 "***"; \              << 
639                 echo >&2 "*** The source tree  << 
640                 echo >&2 "*** in $(abs_srctree << 
641                 echo >&2 "***"; \              << 
642                 false; \                       << 
643         fi                                     << 
644         $(Q)ln -fsn $(srctree) source             475         $(Q)ln -fsn $(srctree) source
645         $(call cmd,makefile)                   !! 476         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
646         $(Q)test -e .gitignore || \            !! 477             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
647         { echo "# this is build directory, ign << 
648 endif                                             478 endif
649                                                   479 
650 # The expansion should be delayed until arch/$ !! 480 ifeq ($(cc-name),clang)
651 # Some architectures define CROSS_COMPILE in a !! 481 ifneq ($(CROSS_COMPILE),)
652 # CC_VERSION_TEXT is referenced from Kconfig ( !! 482 CLANG_TARGET    := --target=$(notdir $(CROSS_COMPILE:%-=%))
653 # and from include/config/auto.conf.cmd to det !! 483 GCC_TOOLCHAIN   := $(realpath $(dir $(shell which $(LD)))/..)
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC << 
655                                                << 
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), << 
657 include $(srctree)/scripts/Makefile.clang      << 
658 endif                                             484 endif
659                                                !! 485 ifneq ($(GCC_TOOLCHAIN),)
660 # Include this also for config targets because !! 486 CLANG_GCC_TC    := --gcc-toolchain=$(GCC_TOOLCHAIN)
661 # cc-cross-prefix to determine CROSS_COMPILE.  !! 487 endif
662 ifdef need-compiler                            !! 488 KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
663 include $(srctree)/scripts/Makefile.compiler   !! 489 KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
                                                   >> 490 KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
                                                   >> 491 KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
664 endif                                             492 endif
665                                                   493 
666 ifdef config-build                             !! 494 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
                                                   >> 495 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
                                                   >> 496 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
                                                   >> 497 export RETPOLINE_CFLAGS
                                                   >> 498 
                                                   >> 499 ifeq ($(config-targets),1)
667 # ============================================    500 # ===========================================================================
668 # *config targets only - make sure prerequisit    501 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe    502 # in scripts/kconfig to make the *config target
670                                                   503 
671 # Read arch-specific Makefile to set KBUILD_DE !! 504 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ    505 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig'                       506 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 507 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 508 export KBUILD_DEFCONFIG KBUILD_KCONFIG
676                                                   509 
677 config: outputmakefile scripts_basic FORCE     !! 510 config: scripts_basic outputmakefile FORCE
678         $(Q)$(MAKE) $(build)=scripts/kconfig $    511         $(Q)$(MAKE) $(build)=scripts/kconfig $@
679                                                   512 
680 %config: outputmakefile scripts_basic FORCE    !! 513 %config: scripts_basic outputmakefile FORCE
681         $(Q)$(MAKE) $(build)=scripts/kconfig $    514         $(Q)$(MAKE) $(build)=scripts/kconfig $@
682                                                   515 
683 else #!config-build                            !! 516 else
684 # ============================================    517 # ===========================================================================
685 # Build targets only - this includes vmlinux,  !! 518 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e    519 # targets and others. In general all targets except *config targets.
687                                                   520 
688 # If building an external module we do not car    521 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules          !! 522 # but instead _all depend on modules
690 PHONY += all                                      523 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),)                          524 ifeq ($(KBUILD_EXTMOD),)
692 __all: all                                     !! 525 _all: all
693 else                                              526 else
694 __all: modules                                 !! 527 _all: modules
695 endif                                             528 endif
696                                                   529 
697 targets :=                                     << 
698                                                << 
699 # Decide whether to build built-in, modular, o    530 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in.                     531 # Normally, just do built-in.
701                                                   532 
702 KBUILD_MODULES :=                                 533 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1                               534 KBUILD_BUILTIN := 1
704                                                   535 
705 # If we have only "make modules", don't compil    536 # If we have only "make modules", don't compile built-in objects.
                                                   >> 537 # When we're building modules with modversions, we need to consider
                                                   >> 538 # the built-in objects during the descend as well, in order to
                                                   >> 539 # make sure the checksums are up to date before we record them.
                                                   >> 540 
706 ifeq ($(MAKECMDGOALS),modules)                    541 ifeq ($(MAKECMDGOALS),modules)
707   KBUILD_BUILTIN :=                            !! 542   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
708 endif                                             543 endif
709                                                   544 
710 # If we have "make <whatever> modules", compil    545 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway.           546 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module    547 # Just "make" or "make all" shall build modules as well
713                                                   548 
714 ifneq ($(filter all modules nsdeps %compile_co !! 549 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
715   KBUILD_MODULES := 1                             550   KBUILD_MODULES := 1
716 endif                                             551 endif
717                                                   552 
718 ifeq ($(MAKECMDGOALS),)                           553 ifeq ($(MAKECMDGOALS),)
719   KBUILD_MODULES := 1                             554   KBUILD_MODULES := 1
720 endif                                             555 endif
721                                                   556 
722 export KBUILD_MODULES KBUILD_BUILTIN              557 export KBUILD_MODULES KBUILD_BUILTIN
723                                                   558 
724 ifdef need-config                              << 
725 include include/config/auto.conf               << 
726 endif                                          << 
727                                                << 
728 ifeq ($(KBUILD_EXTMOD),)                          559 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 560 # Additional helpers built in scripts/
                                                   >> 561 # Carefully list dependencies so we do not try to build scripts twice
                                                   >> 562 # in parallel
                                                   >> 563 PHONY += scripts
                                                   >> 564 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
                                                   >> 565          asm-generic gcc-plugins
                                                   >> 566         $(Q)$(MAKE) $(build)=$(@)
                                                   >> 567 
729 # Objects we will link into vmlinux / subdirs     568 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y          :=                             !! 569 init-y          := init/
731 drivers-y       :=                             !! 570 drivers-y       := drivers/ sound/ firmware/
                                                   >> 571 net-y           := net/
732 libs-y          := lib/                           572 libs-y          := lib/
                                                   >> 573 core-y          := usr/
                                                   >> 574 virt-y          := virt/
733 endif # KBUILD_EXTMOD                             575 endif # KBUILD_EXTMOD
734                                                   576 
735 # The all: target is the default when no targe !! 577 ifeq ($(dot-config),1)
736 # command line.                                !! 578 # Read in config
737 # This allow a user to issue only 'make' to bu !! 579 -include include/config/auto.conf
738 # Defaults to vmlinux, but the arch makefile u << 
739 all: vmlinux                                   << 
740                                                << 
741 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover << 
742 ifdef CONFIG_CC_IS_GCC                         << 
743 CFLAGS_GCOV     += -fno-tree-loop-im           << 
744 endif                                          << 
745 export CFLAGS_GCOV                             << 
746                                                << 
747 # The arch Makefiles can override CC_FLAGS_FTR << 
748 ifdef CONFIG_FUNCTION_TRACER                   << 
749   CC_FLAGS_FTRACE := -pg                       << 
750 endif                                          << 
751                                                   580 
752 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 581 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 582 # Read in dependencies to all Kconfig* files, make sure to run
                                                   >> 583 # oldconfig if changes are detected.
                                                   >> 584 -include include/config/auto.conf.cmd
753                                                   585 
754 ifdef need-config                              !! 586 # To avoid any implicit rule to kick in, define an empty command
755 ifdef may-sync-config                          !! 587 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
756 # Read in dependencies to all Kconfig* files,  << 
757 # changes are detected. This should be include << 
758 # because some architectures define CROSS_COMP << 
759 include include/config/auto.conf.cmd           << 
760                                                << 
761 $(KCONFIG_CONFIG):                             << 
762         @echo >&2 '***'                        << 
763         @echo >&2 '*** Configuration file "$@" << 
764         @echo >&2 '***'                        << 
765         @echo >&2 '*** Please run some configu << 
766         @echo >&2 '*** "make menuconfig" or "m << 
767         @echo >&2 '***'                        << 
768         @/bin/false                            << 
769                                                   588 
770 # The actual configuration files used during t    589 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda    590 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con    591 # include/config/auto.conf (which mirrors .config).
773 #                                              !! 592 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
774 # This exploits the 'multi-target pattern rule !! 593         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
775 # The syncconfig should be executed only once  !! 594 else
776 # (Note: use the grouped target '&:' when we b !! 595 # external modules needs include/generated/autoconf.h and include/config/auto.conf
777 #                                              !! 596 # but do not care if they are up-to-date. Use auto.conf to trigger the test
778 # Do not use $(call cmd,...) here. That would  << 
779 # so you cannot notice that Kconfig is waiting << 
780 %/config/auto.conf %/config/auto.conf.cmd %/ge << 
781         $(Q)$(kecho) "  SYNC    $@"            << 
782         $(Q)$(MAKE) -f $(srctree)/Makefile syn << 
783 else # !may-sync-config                        << 
784 # External modules and some install targets ne << 
785 # and include/config/auto.conf but do not care << 
786 # Use auto.conf to trigger the test            << 
787 PHONY += include/config/auto.conf                 597 PHONY += include/config/auto.conf
788                                                   598 
789 include/config/auto.conf:                         599 include/config/auto.conf:
790         @test -e include/generated/autoconf.h  !! 600         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
791         echo >&2;                                 601         echo >&2;                                                       \
792         echo >&2 "  ERROR: Kernel configuratio    602         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
793         echo >&2 "         include/generated/a    603         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
794         echo >&2 "         Run 'make oldconfig    604         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
795         echo >&2 ;                                605         echo >&2 ;                                                      \
796         /bin/false)                               606         /bin/false)
797                                                   607 
798 endif # may-sync-config                        !! 608 endif # KBUILD_EXTMOD
799 endif # need-config                            !! 609 
                                                   >> 610 else
                                                   >> 611 # Dummy target needed, because used as prerequisite
                                                   >> 612 include/config/auto.conf: ;
                                                   >> 613 endif # $(dot-config)
                                                   >> 614 
                                                   >> 615 # For the kernel to actually contain only the needed exported symbols,
                                                   >> 616 # we have to build modules as well to determine what those symbols are.
                                                   >> 617 # (this can be evaluated only once include/config/auto.conf has been included)
                                                   >> 618 ifdef CONFIG_TRIM_UNUSED_KSYMS
                                                   >> 619   KBUILD_MODULES := 1
                                                   >> 620 endif
                                                   >> 621 
                                                   >> 622 # The all: target is the default when no target is given on the
                                                   >> 623 # command line.
                                                   >> 624 # This allow a user to issue only 'make' to build a kernel including modules
                                                   >> 625 # Defaults to vmlinux, but the arch makefile usually adds further targets
                                                   >> 626 all: vmlinux
800                                                   627 
801 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 628 KBUILD_CFLAGS   += $(call cc-option,-fno-PIE)
                                                   >> 629 KBUILD_AFLAGS   += $(call cc-option,-fno-PIE)
                                                   >> 630 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 631 export CFLAGS_GCOV CFLAGS_KCOV
                                                   >> 632 
                                                   >> 633 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
                                                   >> 634 # values of the respective KBUILD_* variables
                                                   >> 635 ARCH_CPPFLAGS :=
                                                   >> 636 ARCH_AFLAGS :=
                                                   >> 637 ARCH_CFLAGS :=
                                                   >> 638 include arch/$(SRCARCH)/Makefile
                                                   >> 639 
                                                   >> 640 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
                                                   >> 641 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
                                                   >> 642 KBUILD_CFLAGS   += $(call cc-disable-warning, format-truncation)
                                                   >> 643 KBUILD_CFLAGS   += $(call cc-disable-warning, format-overflow)
                                                   >> 644 KBUILD_CFLAGS   += $(call cc-disable-warning, int-in-bool-context)
                                                   >> 645 
                                                   >> 646 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
                                                   >> 647 KBUILD_CFLAGS   += $(call cc-option,-Oz,-Os)
                                                   >> 648 KBUILD_CFLAGS   += $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 649 else
                                                   >> 650 ifdef CONFIG_PROFILE_ALL_BRANCHES
                                                   >> 651 KBUILD_CFLAGS   += -O2 $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 652 else
                                                   >> 653 KBUILD_CFLAGS   += -O2
                                                   >> 654 endif
                                                   >> 655 endif
802                                                   656 
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE       !! 657 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
804 KBUILD_CFLAGS += -O2                           !! 658                         $(call cc-disable-warning,maybe-uninitialized,))
805 KBUILD_RUSTFLAGS += -Copt-level=2              << 
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE         << 
807 KBUILD_CFLAGS += -Os                           << 
808 KBUILD_RUSTFLAGS += -Copt-level=s              << 
809 endif                                          << 
810                                                << 
811 # Always set `debug-assertions` and `overflow- << 
812 # depends on `opt-level` and `debug-assertions << 
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
815                                                   659 
816 # Tell gcc to never replace conditional load w    660 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC                         << 
818 # gcc-10 renamed --param=allow-store-data-race << 
819 # -fno-allow-store-data-races.                 << 
820 KBUILD_CFLAGS   += $(call cc-option,--param=al    661 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow !! 662 
                                                   >> 663 # check for 'asm goto'
                                                   >> 664 ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
                                                   >> 665         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
                                                   >> 666         KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
822 endif                                             667 endif
823                                                   668 
                                                   >> 669 include scripts/Makefile.kcov
                                                   >> 670 include scripts/Makefile.gcc-plugins
                                                   >> 671 
824 ifdef CONFIG_READABLE_ASM                         672 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li    673 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f    674 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio    675 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct    676 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 677 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                                                   >> 678                  $(call cc-option,-fno-ipa-cp-clone,) \
                                                   >> 679                  $(call cc-option,-fno-partial-inlining)
830 endif                                             680 endif
831                                                   681 
832 stackp-flags-y                                 !! 682 ifneq ($(CONFIG_FRAME_WARN),0)
833 stackp-flags-$(CONFIG_STACKPROTECTOR)          !! 683 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)   !! 684 endif
835                                                   685 
836 KBUILD_CFLAGS += $(stackp-flags-y)             !! 686 # This selects the stack protector compiler flag. Testing it is delayed
                                                   >> 687 # until after .config has been reprocessed, in the prepare-compiler-check
                                                   >> 688 # target.
                                                   >> 689 ifdef CONFIG_CC_STACKPROTECTOR_AUTO
                                                   >> 690   stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
                                                   >> 691   stackp-name := AUTO
                                                   >> 692 else
                                                   >> 693 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
                                                   >> 694   stackp-flag := -fstack-protector
                                                   >> 695   stackp-name := REGULAR
                                                   >> 696 else
                                                   >> 697 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
                                                   >> 698   stackp-flag := -fstack-protector-strong
                                                   >> 699   stackp-name := STRONG
                                                   >> 700 else
                                                   >> 701   # If either there is no stack protector for this architecture or
                                                   >> 702   # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
                                                   >> 703   # is empty, skipping all remaining stack protector tests.
                                                   >> 704   #
                                                   >> 705   # Force off for distro compilers that enable stack protector by default.
                                                   >> 706   KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
                                                   >> 707 endif
                                                   >> 708 endif
                                                   >> 709 endif
                                                   >> 710 # Find arch-specific stack protector compiler sanity-checking script.
                                                   >> 711 ifdef stackp-name
                                                   >> 712 ifneq ($(stackp-flag),)
                                                   >> 713   stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
                                                   >> 714   stackp-check := $(wildcard $(stackp-path))
                                                   >> 715   # If the wildcard test matches a test script, run it to check functionality.
                                                   >> 716   ifdef stackp-check
                                                   >> 717     ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
                                                   >> 718       stackp-broken := y
                                                   >> 719     endif
                                                   >> 720   endif
                                                   >> 721   ifndef stackp-broken
                                                   >> 722     # If the stack protector is functional, enable code that depends on it.
                                                   >> 723     KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
                                                   >> 724     # Either we've already detected the flag (for AUTO) or we'll fail the
                                                   >> 725     # build in the prepare-compiler-check rule (for specific flag).
                                                   >> 726     KBUILD_CFLAGS += $(stackp-flag)
                                                   >> 727   else
                                                   >> 728     # We have to make sure stack protector is unconditionally disabled if
                                                   >> 729     # the compiler is broken (in case we're going to continue the build in
                                                   >> 730     # AUTO mode).
                                                   >> 731     KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
                                                   >> 732   endif
                                                   >> 733 endif
                                                   >> 734 endif
837                                                   735 
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 736 ifeq ($(cc-name),clang)
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      !! 737 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
                                                   >> 738 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
                                                   >> 739 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
                                                   >> 740 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
                                                   >> 741 # Quiet clang warning: comparison of unsigned expression < 0 is always false
                                                   >> 742 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
                                                   >> 743 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
                                                   >> 744 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
                                                   >> 745 # See modpost pattern 2
                                                   >> 746 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
                                                   >> 747 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
                                                   >> 748 else
                                                   >> 749 
                                                   >> 750 # These warnings generated too much noise in a regular build.
                                                   >> 751 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
                                                   >> 752 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
                                                   >> 753 endif
840                                                   754 
                                                   >> 755 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
841 ifdef CONFIG_FRAME_POINTER                        756 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    757 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
844 else                                              758 else
845 # Some targets (ARM with Thumb2, for example),    759 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers.  For those, we don't have FUNCTION    760 # pointers.  For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER.  However, FUNCTION_TRA    761 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with     762 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER.      763 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi << 
851 # to "may-omit".                               << 
852 ifndef CONFIG_FUNCTION_TRACER                     764 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS   += -fomit-frame-pointer           765 KBUILD_CFLAGS   += -fomit-frame-pointer
854 endif                                             766 endif
855 endif                                             767 endif
856                                                   768 
857 # Initialize all stack variables with a 0xAA p !! 769 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN            << 
859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat << 
860 endif                                          << 
861                                                   770 
862 # Initialize all stack variables with a zero v !! 771 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_INIT_STACK_ALL_ZERO               !! 772 ifdef CONFIG_DEBUG_INFO_SPLIT
864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer !! 773 KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 774 else
866 # https://github.com/llvm/llvm-project/issues/ !! 775 KBUILD_CFLAGS   += -g
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi << 
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER           << 
869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA << 
870 endif                                             776 endif
                                                   >> 777 KBUILD_AFLAGS   += -Wa,-gdwarf-2
                                                   >> 778 endif
                                                   >> 779 ifdef CONFIG_DEBUG_INFO_DWARF4
                                                   >> 780 KBUILD_CFLAGS   += $(call cc-option, -gdwarf-4,)
871 endif                                             781 endif
872                                                   782 
873 # While VLAs have been removed, GCC produces u !! 783 ifdef CONFIG_DEBUG_INFO_REDUCED
874 # for the randomize_kstack_offset feature. Dis !! 784 KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly) \
875 KBUILD_CFLAGS   += $(call cc-option, -fno-stac !! 785                    $(call cc-option,-fno-var-tracking)
876                                                << 
877 # Clear used registers at func exit (to reduce << 
878 ifdef CONFIG_ZERO_CALL_USED_REGS               << 
879 KBUILD_CFLAGS   += -fzero-call-used-regs=used- << 
880 endif                                             786 endif
881                                                   787 
882 ifdef CONFIG_FUNCTION_TRACER                      788 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC              !! 789 ifndef CC_FLAGS_FTRACE
884   CC_FLAGS_FTRACE       += -mrecord-mcount     !! 790 CC_FLAGS_FTRACE := -pg
885   ifdef CONFIG_HAVE_NOP_MCOUNT                 << 
886     ifeq ($(call cc-option-yn, -mnop-mcount),y << 
887       CC_FLAGS_FTRACE   += -mnop-mcount        << 
888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU << 
889     endif                                      << 
890   endif                                        << 
891 endif                                          << 
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL         << 
893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         << 
894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
895   endif                                        << 
896 endif                                          << 
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT    << 
898   ifdef CONFIG_HAVE_C_RECORDMCOUNT             << 
899     BUILD_C_RECORDMCOUNT := y                  << 
900     export BUILD_C_RECORDMCOUNT                << 
901   endif                                        << 
902 endif                                             791 endif
                                                   >> 792 export CC_FLAGS_FTRACE
903 ifdef CONFIG_HAVE_FENTRY                          793 ifdef CONFIG_HAVE_FENTRY
904   # s390-linux-gnu-gcc did not support -mfentr !! 794 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
905   ifeq ($(call cc-option-yn, -mfentry),y)      !! 795 endif
906     CC_FLAGS_FTRACE     += -mfentry            !! 796 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
907     CC_FLAGS_USING      += -DCC_USING_FENTRY   !! 797 KBUILD_AFLAGS   += $(CC_USING_FENTRY)
908   endif                                        !! 798 ifdef CONFIG_DYNAMIC_FTRACE
                                                   >> 799         ifdef CONFIG_HAVE_C_RECORDMCOUNT
                                                   >> 800                 BUILD_C_RECORDMCOUNT := y
                                                   >> 801                 export BUILD_C_RECORDMCOUNT
                                                   >> 802         endif
909 endif                                             803 endif
910 export CC_FLAGS_FTRACE                         << 
911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA << 
912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)           << 
913 endif                                             804 endif
914                                                   805 
915 # We trigger additional mismatches with less i    806 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH               807 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 808 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif                                             809 endif
919                                                   810 
920 # `rustc`'s `-Zfunction-sections` applies to d << 
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        811 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f !! 812 KBUILD_CFLAGS   += $(call cc-option,-ffunction-sections,)
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections !! 813 KBUILD_CFLAGS   += $(call cc-option,-fdata-sections,)
924 LDFLAGS_vmlinux += --gc-sections               << 
925 endif                                             814 endif
926                                                   815 
927 ifdef CONFIG_SHADOW_CALL_STACK                 !! 816 # arch Makefile may override CC so keep this after arch Makefile is included
928 ifndef CONFIG_DYNAMIC_SCS                      !! 817 NOSTDINC_FLAGS += -nostdinc -isystem $(call shell-cached,$(CC) -print-file-name=include)
929 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac !! 818 CHECKFLAGS     += $(NOSTDINC_FLAGS)
930 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)             << 
931 endif                                          << 
932 export CC_FLAGS_SCS                            << 
933 endif                                          << 
934                                                   819 
935 ifdef CONFIG_LTO_CLANG                         !! 820 # warn about C99 declaration after statement
936 ifdef CONFIG_LTO_CLANG_THIN                    !! 821 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
937 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit << 
938 else                                           << 
939 CC_FLAGS_LTO    := -flto                       << 
940 endif                                          << 
941 CC_FLAGS_LTO    += -fvisibility=hidden         << 
942                                                   822 
943 # Limit inlining across translation units to r !! 823 # disable pointer signed / unsigned warnings in gcc 4.0
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 824 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
945 endif                                          << 
946                                                   825 
947 ifdef CONFIG_LTO                               !! 826 # disable invalid "can't wrap" optimizations for signed / pointers
948 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)    !! 827 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
949 KBUILD_AFLAGS   += -fno-lto                    << 
950 export CC_FLAGS_LTO                            << 
951 endif                                          << 
952                                                   828 
953 ifdef CONFIG_CFI_CLANG                         !! 829 # clang sets -fmerge-all-constants by default as optimization, but this
954 CC_FLAGS_CFI    := -fsanitize=kcfi             !! 830 # is non-conforming behavior for C and in fact breaks the kernel, so we
955 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)             !! 831 # need to disable it here generally.
956 export CC_FLAGS_CFI                            !! 832 KBUILD_CFLAGS   += $(call cc-option,-fno-merge-all-constants)
957 endif                                          !! 833 
                                                   >> 834 # for gcc -fno-merge-all-constants disables everything, but it is fine
                                                   >> 835 # to have actual conforming behavior enabled.
                                                   >> 836 KBUILD_CFLAGS   += $(call cc-option,-fmerge-constants)
958                                                   837 
959 # Architectures can define flags to add/remove !! 838 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
960 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN !! 839 KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
961 export CC_FLAGS_FPU                            << 
962 export CC_FLAGS_NO_FPU                         << 
963                                                   840 
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         !! 841 # conserve stack if available
965 # Set the minimal function alignment. Use the  !! 842 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
966 # -fmin-function-alignment if it is available, << 
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
970 else                                           << 
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
972 endif                                          << 
973 endif                                          << 
974                                                   843 
975 # arch Makefile may override CC so keep this a !! 844 # disallow errors like 'EXPORT_GPL(foo);' with missing header
976 NOSTDINC_FLAGS += -nostdinc                    !! 845 KBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
977                                                   846 
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 847 # require functions to have arguments in prototypes, not empty 'int foo()'
979 # the kernel uses only C99 flexible arrays for !! 848 KBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
980 # arrays. Enforce this for everything that may << 
981 # perform bounds checking.                     << 
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 
983                                                << 
984 #Currently, disable -Wstringop-overflow for GC << 
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 
987                                                   849 
988 # disable invalid "can't wrap" optimizations f !! 850 # Prohibit date/time macros, which would make the build non-deterministic
989 KBUILD_CFLAGS   += -fno-strict-overflow        !! 851 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
990                                                   852 
991 # Make sure -fstack-check isn't enabled (like  !! 853 # enforce correct pointer usage
992 KBUILD_CFLAGS  += -fno-stack-check             !! 854 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
993                                                   855 
994 # conserve stack if available                  !! 856 # Require designated initializers for all marked structures
995 ifdef CONFIG_CC_IS_GCC                         !! 857 KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
996 KBUILD_CFLAGS   += -fconserve-stack            << 
997 endif                                          << 
998                                                   858 
999 # change __FILE__ to the relative path from th !! 859 # use the deterministic mode of AR if available
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 860 KBUILD_ARFLAGS := $(call ar-option,D)
1001                                                  861 
1002 # include additional Makefiles when needed    !! 862 include scripts/Makefile.kasan
1003 include-y                       := scripts/Ma !! 863 include scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma !! 864 include scripts/Makefile.ubsan
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 
1006 include-$(CONFIG_KASAN)         += scripts/Ma << 
1007 include-$(CONFIG_KCSAN)         += scripts/Ma << 
1008 include-$(CONFIG_KMSAN)         += scripts/Ma << 
1009 include-$(CONFIG_UBSAN)         += scripts/Ma << 
1010 include-$(CONFIG_KCOV)          += scripts/Ma << 
1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma << 
1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma << 
1013                                               << 
1014 include $(addprefix $(srctree)/, $(include-y) << 
1015                                               << 
1016 # scripts/Makefile.gcc-plugins is intentional << 
1017 # Do not add $(call cc-option,...) below this << 
1018 # from the clean source tree, the GCC plugins << 
1019                                               << 
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  << 
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)               << 
1022 KBUILD_AFLAGS   += $(KAFLAGS)                 << 
1023 KBUILD_CFLAGS   += $(KCFLAGS)                 << 
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             << 
1025                                               << 
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1      << 
1027 LDFLAGS_vmlinux += --build-id=sha1            << 
1028                                               << 
1029 KBUILD_LDFLAGS  += -z noexecstack             << 
1030 ifeq ($(CONFIG_LD_IS_BFD),y)                  << 
1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn << 
1032 endif                                         << 
1033                                                  865 
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)             !! 866 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
1035 LDFLAGS_vmlinux += -X                         !! 867 # last assignments
1036 endif                                         !! 868 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
                                                   >> 869 KBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
                                                   >> 870 KBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
1037                                                  871 
1038 ifeq ($(CONFIG_RELR),y)                       !! 872 # Use --build-id when available.
1039 # ld.lld before 15 did not support -z pack-re !! 873 LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy !! 874 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
1041 endif                                         !! 875 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1042                                                  876 
1043 # We never want expected sections to be place !! 877 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
1044 # linker. All sections should be explicitly n !! 878 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
1045 ifdef CONFIG_LD_ORPHAN_WARN                   << 
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 
1047 endif                                            879 endif
1048                                                  880 
1049 # Align the bit size of userspace programs wi !! 881 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1050 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta !! 882 LDFLAGS_vmlinux += $(call ld-option, -X,)
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta !! 883 endif
1052                                               << 
1053 # make the checker run with the right archite << 
1054 CHECKFLAGS += --arch=$(ARCH)                  << 
1055                                               << 
1056 # insure the checker run with the right endia << 
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- << 
1058                                               << 
1059 # the checker needs the correct machine size  << 
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) << 
1061                                                  884 
1062 # Default kernel image to build when no speci    885 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman    886 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment                         887 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi    888 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value                             889 # this default value
1067 export KBUILD_IMAGE ?= vmlinux                   890 export KBUILD_IMAGE ?= vmlinux
1068                                                  891 
1069 #                                                892 #
1070 # INSTALL_PATH specifies where to place the u    893 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i    894 # images. Default is /boot, but you can set it to other values
1072 export  INSTALL_PATH ?= /boot                    895 export  INSTALL_PATH ?= /boot
1073                                                  896 
1074 #                                                897 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re    898 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in     899 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default    900 # an argument if needed. Otherwise it defaults to the kernel install path
1078 #                                                901 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    902 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080                                                  903 
1081 #                                                904 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL    905 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots.  This     906 # relocations required by build roots.  This is not defined in the
1084 # makefile but the argument can be passed to     907 # makefile but the argument can be passed to make if needed.
1085 #                                                908 #
1086                                                  909 
1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    910 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB                                    911 export MODLIB
1089                                                  912 
1090 PHONY += prepare0                             !! 913 #
1091                                               !! 914 # INSTALL_MOD_STRIP, if defined, will cause modules to be
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 915 # stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
1093 export MODORDER := $(extmod_prefix)modules.or !! 916 # the default option --strip-debug will be used.  Otherwise,
1094 export MODULES_NSDEPS := $(extmod_prefix)modu !! 917 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
1095                                               !! 918 
1096 ifeq ($(KBUILD_EXTMOD),)                      !! 919 ifdef INSTALL_MOD_STRIP
                                                   >> 920 ifeq ($(INSTALL_MOD_STRIP),1)
                                                   >> 921 mod_strip_cmd = $(STRIP) --strip-debug
                                                   >> 922 else
                                                   >> 923 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
                                                   >> 924 endif # INSTALL_MOD_STRIP=1
                                                   >> 925 else
                                                   >> 926 mod_strip_cmd = true
                                                   >> 927 endif # INSTALL_MOD_STRIP
                                                   >> 928 export mod_strip_cmd
                                                   >> 929 
                                                   >> 930 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
                                                   >> 931 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 932 # or CONFIG_MODULE_COMPRESS_XZ.
                                                   >> 933 
                                                   >> 934 mod_compress_cmd = true
                                                   >> 935 ifdef CONFIG_MODULE_COMPRESS
                                                   >> 936   ifdef CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 937     mod_compress_cmd = gzip -n -f
                                                   >> 938   endif # CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 939   ifdef CONFIG_MODULE_COMPRESS_XZ
                                                   >> 940     mod_compress_cmd = xz -f
                                                   >> 941   endif # CONFIG_MODULE_COMPRESS_XZ
                                                   >> 942 endif # CONFIG_MODULE_COMPRESS
                                                   >> 943 export mod_compress_cmd
                                                   >> 944 
                                                   >> 945 # Select initial ramdisk compression format, default is gzip(1).
                                                   >> 946 # This shall be used by the dracut(8) tool while creating an initramfs image.
                                                   >> 947 #
                                                   >> 948 INITRD_COMPRESS-y                  := gzip
                                                   >> 949 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
                                                   >> 950 INITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
                                                   >> 951 INITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
                                                   >> 952 INITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
                                                   >> 953 INITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
                                                   >> 954 # do not export INITRD_COMPRESS, since we didn't actually
                                                   >> 955 # choose a sane default compression above.
                                                   >> 956 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1097                                                  957 
1098 build-dir       := .                          !! 958 ifdef CONFIG_MODULE_SIG_ALL
1099 clean-dirs      := $(sort . Documentation \   !! 959 $(eval $(call config_filename,MODULE_SIG_KEY))
1100                      $(patsubst %/,%,$(filter << 
1101                         $(drivers-) $(libs-)) << 
1102                                               << 
1103 export ARCH_CORE        := $(core-y)          << 
1104 export ARCH_LIB         := $(filter %/, $(lib << 
1105 export ARCH_DRIVERS     := $(drivers-y) $(dri << 
1106 # Externally visible symbols (used by link-vm << 
1107                                                  960 
1108 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 961 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1109 ifdef CONFIG_MODULES                          << 
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a << 
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib << 
1112 else                                             962 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 963 mod_sign_cmd = true
1114 endif                                            964 endif
                                                   >> 965 export mod_sign_cmd
1115                                                  966 
1116 export KBUILD_VMLINUX_LIBS                    !! 967 ifdef CONFIG_STACK_VALIDATION
1117 export KBUILD_LDS          := arch/$(SRCARCH) !! 968   has_libelf := $(call try-run,\
                                                   >> 969                 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
                                                   >> 970   ifeq ($(has_libelf),1)
                                                   >> 971     objtool_target := tools/objtool FORCE
                                                   >> 972   else
                                                   >> 973     ifdef CONFIG_UNWINDER_ORC
                                                   >> 974       $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
                                                   >> 975     else
                                                   >> 976       $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
                                                   >> 977     endif
                                                   >> 978     SKIP_STACK_VALIDATION := 1
                                                   >> 979     export SKIP_STACK_VALIDATION
                                                   >> 980   endif
                                                   >> 981 endif
                                                   >> 982 
                                                   >> 983 
                                                   >> 984 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 985 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1118                                                  986 
                                                   >> 987 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
                                                   >> 988                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                                                   >> 989                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
                                                   >> 990 
                                                   >> 991 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
                                                   >> 992                      $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
                                                   >> 993 
                                                   >> 994 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
                                                   >> 995 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
                                                   >> 996 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
                                                   >> 997 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
                                                   >> 998 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
                                                   >> 999 libs-y2         := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
                                                   >> 1000 virt-y          := $(patsubst %/, %/built-in.o, $(virt-y))
                                                   >> 1001 
                                                   >> 1002 # Externally visible symbols (used by link-vmlinux.sh)
                                                   >> 1003 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
                                                   >> 1004 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
                                                   >> 1005 export KBUILD_VMLINUX_LIBS := $(libs-y1)
                                                   >> 1006 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 1007 export LDFLAGS_vmlinux
                                                   >> 1008 # used by scripts/package/Makefile
                                                   >> 1009 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
                                                   >> 1010 
                                                   >> 1011 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
                                                   >> 1012 
                                                   >> 1013 # Include targets which we want to execute sequentially if the rest of the
                                                   >> 1014 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
                                                   >> 1015 # evaluated more than once.
                                                   >> 1016 PHONY += vmlinux_prereq
                                                   >> 1017 vmlinux_prereq: $(vmlinux-deps) FORCE
                                                   >> 1018 ifdef CONFIG_HEADERS_CHECK
                                                   >> 1019         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
                                                   >> 1020 endif
                                                   >> 1021 ifdef CONFIG_GDB_SCRIPTS
                                                   >> 1022         $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
                                                   >> 1023 endif
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS                   1024 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the !! 1025         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1121 # we have to build modules as well to determi !! 1026           "$(MAKE) -f $(srctree)/Makefile vmlinux"
1122 KBUILD_MODULES := 1                           << 
1123 endif                                            1027 endif
1124                                                  1028 
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1029 # standalone target for easier testing
1126 quiet_cmd_ar_vmlinux.a = AR      $@           !! 1030 include/generated/autoksyms.h: FORCE
1127       cmd_ar_vmlinux.a = \                    !! 1031         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
1128         rm -f $@; \                           << 
1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1131                                               << 
1132 targets += vmlinux.a                          << 
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1134         $(call if_changed,ar_vmlinux.a)       << 
1135                                               << 
1136 PHONY += vmlinux_o                            << 
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1139                                                  1032 
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1033 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1141         @:                                    !! 1034 
                                                   >> 1035 # Final link of vmlinux with optional arch pass after final link
                                                   >> 1036 cmd_link-vmlinux =                                                 \
                                                   >> 1037         $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ;    \
                                                   >> 1038         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1142                                                  1039 
1143 PHONY += vmlinux                              !! 1040 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1041         +$(call if_changed,link-vmlinux)
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1042 
1146 # unrelated; the decompressors just happen to !! 1043 # Build samples along the rest of the kernel
1147 # arch/*/boot/compressed/vmlinux.             !! 1044 ifdef CONFIG_SAMPLES
1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1045 vmlinux-dirs += samples
1149 #                                             !! 1046 endif
1150 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1151 #   https://savannah.gnu.org/bugs/?61463      << 
1152 # For Make > 4.4, the following simple code w << 
1153 #  vmlinux: private export LDFLAGS_vmlinux := << 
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1157         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1158                                                  1047 
1159 # The actual objects are generated when desce    1048 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in            1049 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1050 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1162                                                  1051 
1163 ifeq ($(origin KERNELRELEASE),file)           !! 1052 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1053 # Preset locale variables to speed up the build process. Limit locale
1165 else                                          !! 1054 # tweaks to this spot to avoid wrong language settings when running
1166 filechk_kernel.release = echo $(KERNELRELEASE !! 1055 # make menuconfig etc.
1167 endif                                         !! 1056 # Error messages still appears in the original language
                                                   >> 1057 
                                                   >> 1058 PHONY += $(vmlinux-dirs)
                                                   >> 1059 $(vmlinux-dirs): prepare scripts
                                                   >> 1060         $(Q)$(MAKE) $(build)=$@ need-builtin=1
                                                   >> 1061 
                                                   >> 1062 define filechk_kernel.release
                                                   >> 1063         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
                                                   >> 1064 endef
1168                                                  1065 
1169 # Store (new) KERNELRELEASE string in include    1066 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE          !! 1067 include/config/kernel.release: include/config/auto.conf FORCE
1171         $(call filechk,kernel.release)           1068         $(call filechk,kernel.release)
1172                                                  1069 
1173 # Additional helpers built in scripts/        << 
1174 # Carefully list dependencies so we do not tr << 
1175 # in parallel                                 << 
1176 PHONY += scripts                              << 
1177 scripts: scripts_basic scripts_dtc            << 
1178         $(Q)$(MAKE) $(build)=$(@)             << 
1179                                                  1070 
1180 # Things we need to do before we recursively     1071 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare".        1072 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is    1073 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w    1074 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed /     1075 # version.h and scripts_basic is processed / created.
1185                                                  1076 
1186 PHONY += prepare archprepare                  !! 1077 # Listed in dependency order
                                                   >> 1078 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1187                                                  1079 
1188 archprepare: outputmakefile archheaders archs !! 1080 # prepare3 is used to check if we are building in a separate output directory,
1189         asm-generic $(version_h) include/gene !! 1081 # and if so do:
1190         include/generated/compile.h include/g !! 1082 # 1) Check that make has not been executed in the kernel src $(srctree)
1191                                               !! 1083 prepare3: include/config/kernel.release
1192 prepare0: archprepare                         !! 1084 ifneq ($(KBUILD_SRC),)
1193         $(Q)$(MAKE) $(build)=scripts/mod      !! 1085         @$(kecho) '  Using $(srctree) as source for kernel'
1194         $(Q)$(MAKE) $(build)=. prepare        !! 1086         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
                                                   >> 1087                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
                                                   >> 1088                 echo >&2 "  in the '$(srctree)' directory.";\
                                                   >> 1089                 /bin/false; \
                                                   >> 1090         fi;
                                                   >> 1091 endif
                                                   >> 1092 
                                                   >> 1093 # prepare2 creates a makefile if using a separate output directory.
                                                   >> 1094 # From this point forward, .config has been reprocessed, so any rules
                                                   >> 1095 # that need to depend on updated CONFIG_* values can be checked here.
                                                   >> 1096 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
                                                   >> 1097 
                                                   >> 1098 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
                                                   >> 1099                    include/config/auto.conf
                                                   >> 1100         $(cmd_crmodverdir)
1195                                                  1101 
1196 # All the preparing..                         !! 1102 archprepare: archheaders archscripts prepare1 scripts_basic
1197 prepare: prepare0                             << 
1198 ifdef CONFIG_RUST                             << 
1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1200         $(Q)$(MAKE) $(build)=rust             << 
1201 endif                                         << 
1202                                                  1103 
1203 PHONY += remove-stale-files                   !! 1104 prepare0: archprepare gcc-plugins
1204 remove-stale-files:                           !! 1105         $(Q)$(MAKE) $(build)=.
1205         $(Q)$(srctree)/scripts/remove-stale-f << 
1206                                                  1106 
1207 # Support for using generic headers in asm-ge !! 1107 # All the preparing..
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1108 prepare: prepare0 prepare-objtool
1209                                                  1109 
                                                   >> 1110 # Support for using generic headers in asm-generic
1210 PHONY += asm-generic uapi-asm-generic            1111 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic                    1112 asm-generic: uapi-asm-generic
1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1113         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1213         generic=include/asm-generic           !! 1114                     src=asm obj=arch/$(SRCARCH)/include/generated/asm
1214 uapi-asm-generic:                                1115 uapi-asm-generic:
1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1116         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1216         generic=include/uapi/asm-generic      !! 1117                     src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
                                                   >> 1118 
                                                   >> 1119 PHONY += prepare-objtool
                                                   >> 1120 prepare-objtool: $(objtool_target)
                                                   >> 1121 
                                                   >> 1122 # Check for CONFIG flags that require compiler support. Abort the build
                                                   >> 1123 # after .config has been processed, but before the kernel build starts.
                                                   >> 1124 #
                                                   >> 1125 # For security-sensitive CONFIG options, we don't want to fallback and/or
                                                   >> 1126 # silently change which compiler flags will be used, since that leads to
                                                   >> 1127 # producing kernels with different security feature characteristics
                                                   >> 1128 # depending on the compiler used. (For example, "But I selected
                                                   >> 1129 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
                                                   >> 1130 PHONY += prepare-compiler-check
                                                   >> 1131 prepare-compiler-check: FORCE
                                                   >> 1132 # Make sure compiler supports requested stack protector flag.
                                                   >> 1133 ifdef stackp-name
                                                   >> 1134   # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
                                                   >> 1135   ifeq ($(stackp-flag),)
                                                   >> 1136         @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1137                   Compiler does not support any known stack-protector >&2
                                                   >> 1138   else
                                                   >> 1139   # Fail if specifically requested stack protector is missing.
                                                   >> 1140   ifeq ($(call cc-option, $(stackp-flag)),)
                                                   >> 1141         @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1142                   $(stackp-flag) not supported by compiler >&2 && exit 1
                                                   >> 1143   endif
                                                   >> 1144   endif
                                                   >> 1145 endif
                                                   >> 1146 # Make sure compiler does not have buggy stack-protector support. If a
                                                   >> 1147 # specific stack-protector was requested, fail the build, otherwise warn.
                                                   >> 1148 ifdef stackp-broken
                                                   >> 1149   ifeq ($(stackp-name),AUTO)
                                                   >> 1150         @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1151                   $(stackp-flag) available but compiler is broken: disabling >&2
                                                   >> 1152   else
                                                   >> 1153         @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1154                   $(stackp-flag) available but compiler is broken >&2 && exit 1
                                                   >> 1155   endif
                                                   >> 1156 endif
                                                   >> 1157         @:
1217                                                  1158 
1218 # Generate some files                            1159 # Generate some files
1219 # -------------------------------------------    1160 # ---------------------------------------------------------------------------
1220                                                  1161 
1221 # KERNELRELEASE can change from a few differe    1162 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force    1163 # needs to be updated, so this check is forced on all builds
1223                                                  1164 
1224 uts_len := 64                                    1165 uts_len := 64
1225 define filechk_utsrelease.h                      1166 define filechk_utsrelease.h
1226         if [ `echo -n "$(KERNELRELEASE)" | wc    1167         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227           echo '"$(KERNELRELEASE)" exceeds $(    1168           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1228           exit 1;                                1169           exit 1;                                                         \
1229         fi;                                      1170         fi;                                                               \
1230         echo \#define UTS_RELEASE \"$(KERNELR !! 1171         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1231 endef                                            1172 endef
1232                                                  1173 
1233 define filechk_version.h                         1174 define filechk_version.h
1234         if [ $(SUBLEVEL) -gt 255 ]; then      !! 1175         (echo \#define LINUX_VERSION_CODE $(shell                         \
1235                 echo \#define LINUX_VERSION_C !! 1176         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1236                 expr $(VERSION) \* 65536 + $( !! 1177         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1237         else                                  << 
1238                 echo \#define LINUX_VERSION_C << 
1239                 expr $(VERSION) \* 65536 + $( << 
1240         fi;                                   << 
1241         echo '#define KERNEL_VERSION(a,b,c) ( << 
1242         ((c) > 255 ? 255 : (c)))';            << 
1243         echo \#define LINUX_VERSION_MAJOR $(V << 
1244         echo \#define LINUX_VERSION_PATCHLEVE << 
1245         echo \#define LINUX_VERSION_SUBLEVEL  << 
1246 endef                                            1178 endef
1247                                                  1179 
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1180 $(version_h): $(srctree)/Makefile FORCE
1249 $(version_h): private SUBLEVEL := $(or $(SUBL << 
1250 $(version_h): FORCE                           << 
1251         $(call filechk,version.h)                1181         $(call filechk,version.h)
                                                   >> 1182         $(Q)rm -f $(old_version_h)
1252                                                  1183 
1253 include/generated/utsrelease.h: include/confi    1184 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254         $(call filechk,utsrelease.h)             1185         $(call filechk,utsrelease.h)
1255                                                  1186 
1256 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1257         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1258                                               << 
1259 include/generated/compile.h: FORCE            << 
1260         $(call filechk,compile.h)             << 
1261                                               << 
1262 PHONY += headerdep                               1187 PHONY += headerdep
1263 headerdep:                                       1188 headerdep:
1264         $(Q)find $(srctree)/include/ -name '*    1189         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265         $(srctree)/scripts/headerdep.pl -I$(s    1190         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266                                                  1191 
1267 # -------------------------------------------    1192 # ---------------------------------------------------------------------------
1268 # Kernel headers                                 1193 # Kernel headers
1269                                                  1194 
1270 #Default location for installed headers          1195 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr         1196 export INSTALL_HDR_PATH = $(objtree)/usr
1272                                                  1197 
1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1198 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1274       cmd_headers_install = \                 !! 1199 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
1275         mkdir -p $(INSTALL_HDR_PATH); \       << 
1276         rsync -mrl --include='*/' --include=' << 
1277         usr/include $(INSTALL_HDR_PATH)       << 
1278                                               << 
1279 PHONY += headers_install                      << 
1280 headers_install: headers                      << 
1281         $(call cmd,headers_install)           << 
1282                                               << 
1283 PHONY += archheaders archscripts              << 
1284                                               << 
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he << 
1286                                               << 
1287 PHONY += headers                              << 
1288 headers: $(version_h) scripts_unifdef uapi-as << 
1289         $(if $(filter um, $(SRCARCH)), $(erro << 
1290         $(Q)$(MAKE) $(hdr-inst)=include/uapi  << 
1291         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC << 
1292                                               << 
1293 ifdef CONFIG_HEADERS_INSTALL                  << 
1294 prepare: headers                              << 
1295 endif                                         << 
1296                                               << 
1297 PHONY += scripts_unifdef                      << 
1298 scripts_unifdef: scripts_basic                << 
1299         $(Q)$(MAKE) $(build)=scripts scripts/ << 
1300                                                  1200 
1301 # ------------------------------------------- !! 1201 PHONY += archheaders
1302 # Install                                     !! 1202 archheaders:
1303                                               << 
1304 # Many distributions have the custom install  << 
1305 # If DKMS is installed, 'make install' will e << 
1306 # to this Makefile to build and install exter << 
1307 # Cancel sub_make_done so that options such a << 
1308                                                  1203 
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH)   !! 1204 PHONY += archscripts
1310       cmd_install = unset sub_make_done; $(sr !! 1205 archscripts:
1311                                                  1206 
1312 # ------------------------------------------- !! 1207 PHONY += __headers
1313 # vDSO install                                !! 1208 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
                                                   >> 1209         $(Q)$(MAKE) $(build)=scripts build_unifdef
                                                   >> 1210 
                                                   >> 1211 PHONY += headers_install_all
                                                   >> 1212 headers_install_all:
                                                   >> 1213         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1314                                                  1214 
1315 PHONY += vdso_install                         !! 1215 PHONY += headers_install
1316 vdso_install: export INSTALL_FILES = $(vdso-i !! 1216 headers_install: __headers
1317 vdso_install:                                 !! 1217         $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1318         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1218           $(error Headers not exportable for the $(SRCARCH) architecture))
1319                                               !! 1219         $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
1320 # ------------------------------------------- !! 1220         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
1321 # Tools                                       !! 1221 
1322                                               !! 1222 PHONY += headers_check_all
1323 ifdef CONFIG_OBJTOOL                          !! 1223 headers_check_all: headers_install_all
1324 prepare: tools/objtool                        !! 1224         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1325 endif                                         !! 1225 
1326                                               !! 1226 PHONY += headers_check
1327 ifdef CONFIG_BPF                              !! 1227 headers_check: headers_install
1328 ifdef CONFIG_DEBUG_INFO_BTF                   !! 1228         $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
1329 prepare: tools/bpf/resolve_btfids             !! 1229         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
1330 endif                                         << 
1331 endif                                         << 
1332                                               << 
1333 # The tools build system is not a part of Kbu << 
1334 # its own unique issues. If you need to integ << 
1335 # please consider locating that tool outside  << 
1336 # standard Kbuild "hostprogs" syntax instead  << 
1337 # here. See Documentation/kbuild/makefiles.rs << 
1338                                               << 
1339 PHONY += resolve_btfids_clean                 << 
1340                                               << 
1341 resolve_btfids_O = $(abspath $(objtree))/tool << 
1342                                               << 
1343 # tools/bpf/resolve_btfids directory might no << 
1344 # in output directory, skip its clean in that << 
1345 resolve_btfids_clean:                         << 
1346 ifneq ($(wildcard $(resolve_btfids_O)),)      << 
1347         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 
1348 endif                                         << 
1349                                               << 
1350 # Clear a bunch of variables before executing << 
1351 ifeq ($(quiet),silent_)                       << 
1352 tools_silent=s                                << 
1353 endif                                         << 
1354                                               << 
1355 tools/: FORCE                                 << 
1356         $(Q)mkdir -p $(objtree)/tools         << 
1357         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1358                                               << 
1359 tools/%: FORCE                                << 
1360         $(Q)mkdir -p $(objtree)/tools         << 
1361         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1362                                                  1230 
1363 # -------------------------------------------    1231 # ---------------------------------------------------------------------------
1364 # Kernel selftest                                1232 # Kernel selftest
1365                                                  1233 
1366 PHONY += kselftest                               1234 PHONY += kselftest
1367 kselftest: headers                            !! 1235 kselftest:
1368         $(Q)$(MAKE) -C $(srctree)/tools/testi    1236         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369                                                  1237 
1370 kselftest-%: headers FORCE                    !! 1238 PHONY += kselftest-clean
1371         $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1239 kselftest-clean:
                                                   >> 1240         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1372                                                  1241 
1373 PHONY += kselftest-merge                         1242 PHONY += kselftest-merge
1374 kselftest-merge:                                 1243 kselftest-merge:
1375         $(if $(wildcard $(objtree)/.config),,    1244         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376         $(Q)find $(srctree)/tools/testing/sel !! 1245         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1377                 xargs $(srctree)/scripts/kcon !! 1246                 -m $(objtree)/.config \
1378         $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1247                 $(srctree)/tools/testing/selftests/*/config
                                                   >> 1248         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379                                                  1249 
1380 # -------------------------------------------    1250 # ---------------------------------------------------------------------------
1381 # Devicetree files                            !! 1251 # Modules
1382                                               << 
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ << 
1384 dtstree := arch/$(SRCARCH)/boot/dts           << 
1385 endif                                         << 
1386                                               << 
1387 ifneq ($(dtstree),)                           << 
1388                                               << 
1389 %.dtb: dtbs_prepare                           << 
1390         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1391                                               << 
1392 %.dtbo: dtbs_prepare                          << 
1393         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1394                                                  1252 
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1253 ifdef CONFIG_MODULES
1396 dtbs: dtbs_prepare                            << 
1397         $(Q)$(MAKE) $(build)=$(dtstree) need- << 
1398                                                  1254 
1399 # include/config/kernel.release is actually n !! 1255 # By default, build modules as well
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 
1401 # dtbs_install depend on it as dtbs_install m << 
1402 dtbs_prepare: include/config/kernel.release s << 
1403                                                  1256 
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), !! 1257 all: modules
1405 export CHECK_DTBS=y                           << 
1406 endif                                         << 
1407                                                  1258 
1408 ifneq ($(CHECK_DTBS),)                        !! 1259 # Build modules
1409 dtbs_prepare: dt_binding_schemas              !! 1260 #
1410 endif                                         !! 1261 # A module can be listed more than once in obj-m resulting in
                                                   >> 1262 # duplicate lines in modules.order files.  Those are removed
                                                   >> 1263 # using awk while concatenating to the final file.
                                                   >> 1264 
                                                   >> 1265 PHONY += modules
                                                   >> 1266 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
                                                   >> 1267         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
                                                   >> 1268         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1269         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1411                                                  1270 
1412 dtbs_check: dtbs                              !! 1271 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
                                                   >> 1272         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1413                                                  1273 
1414 dtbs_install:                                 !! 1274 %/modules.builtin: include/config/auto.conf
1415         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1275         $(Q)$(MAKE) $(modbuiltin)=$*
1416                                                  1276 
1417 ifdef CONFIG_OF_EARLY_FLATTREE                << 
1418 all: dtbs                                     << 
1419 endif                                         << 
1420                                                  1277 
1421 endif                                         !! 1278 # Target to prepare building external modules
                                                   >> 1279 PHONY += modules_prepare
                                                   >> 1280 modules_prepare: prepare scripts
1422                                                  1281 
1423 PHONY += scripts_dtc                          !! 1282 # Target to install modules
1424 scripts_dtc: scripts_basic                    !! 1283 PHONY += modules_install
1425         $(Q)$(MAKE) $(build)=scripts/dtc      !! 1284 modules_install: _modinst_ _modinst_post
                                                   >> 1285 
                                                   >> 1286 PHONY += _modinst_
                                                   >> 1287 _modinst_:
                                                   >> 1288         @rm -rf $(MODLIB)/kernel
                                                   >> 1289         @rm -f $(MODLIB)/source
                                                   >> 1290         @mkdir -p $(MODLIB)/kernel
                                                   >> 1291         @ln -s $(abspath $(srctree)) $(MODLIB)/source
                                                   >> 1292         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1293                 rm -f $(MODLIB)/build ; \
                                                   >> 1294                 ln -s $(CURDIR) $(MODLIB)/build ; \
                                                   >> 1295         fi
                                                   >> 1296         @cp -f $(objtree)/modules.order $(MODLIB)/
                                                   >> 1297         @cp -f $(objtree)/modules.builtin $(MODLIB)/
                                                   >> 1298         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1299 
                                                   >> 1300 # This depmod is only for convenience to give the initial
                                                   >> 1301 # boot a modules.dep even before / is mounted read-write.  However the
                                                   >> 1302 # boot script depmod is the master version.
                                                   >> 1303 PHONY += _modinst_post
                                                   >> 1304 _modinst_post: _modinst_
                                                   >> 1305         $(call cmd,depmod)
1426                                                  1306 
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1307 ifeq ($(CONFIG_MODULE_SIG), y)
1428 export CHECK_DTBS=y                           !! 1308 PHONY += modules_sign
                                                   >> 1309 modules_sign:
                                                   >> 1310         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1429 endif                                            1311 endif
1430                                                  1312 
1431 PHONY += dt_binding_check dt_binding_schemas  !! 1313 else # CONFIG_MODULES
1432 dt_binding_check: dt_binding_schemas scripts_ << 
1433         $(Q)$(MAKE) $(build)=Documentation/de << 
1434                                               << 
1435 dt_binding_schemas:                           << 
1436         $(Q)$(MAKE) $(build)=Documentation/de << 
1437                                               << 
1438 PHONY += dt_compatible_check                  << 
1439 dt_compatible_check: dt_binding_schemas       << 
1440         $(Q)$(MAKE) $(build)=Documentation/de << 
1441                                                  1314 
                                                   >> 1315 # Modules not configured
1442 # -------------------------------------------    1316 # ---------------------------------------------------------------------------
1443 # Modules                                     << 
1444                                               << 
1445 ifdef CONFIG_MODULES                          << 
1446                                               << 
1447 # By default, build modules as well           << 
1448                                               << 
1449 all: modules                                  << 
1450                                               << 
1451 # When we're building modules with modversion << 
1452 # the built-in objects during the descend as  << 
1453 # make sure the checksums are up to date befo << 
1454 ifdef CONFIG_MODVERSIONS                      << 
1455   KBUILD_BUILTIN := 1                         << 
1456 endif                                         << 
1457                                               << 
1458 # Build modules                               << 
1459 #                                             << 
1460                                               << 
1461 # *.ko are usually independent of vmlinux, bu << 
1462 # is an exception.                            << 
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           << 
1464 KBUILD_BUILTIN := 1                           << 
1465 modules: vmlinux                              << 
1466 endif                                         << 
1467                                                  1317 
1468 modules: modules_prepare                      !! 1318 PHONY += modules modules_install
1469                                               !! 1319 modules modules_install:
1470 # Target to prepare building external modules !! 1320         @echo >&2
1471 modules_prepare: prepare                      !! 1321         @echo >&2 "The present kernel configuration has modules disabled."
1472         $(Q)$(MAKE) $(build)=scripts scripts/ !! 1322         @echo >&2 "Type 'make config' and enable loadable module support."
                                                   >> 1323         @echo >&2 "Then build a kernel with module support enabled."
                                                   >> 1324         @echo >&2
                                                   >> 1325         @exit 1
1473                                                  1326 
1474 endif # CONFIG_MODULES                           1327 endif # CONFIG_MODULES
1475                                                  1328 
1476 ###                                              1329 ###
1477 # Cleaning is done on three levels.              1330 # Cleaning is done on three levels.
1478 # make clean     Delete most generated files     1331 # make clean     Delete most generated files
1479 #                Leave enough to build extern    1332 #                Leave enough to build external modules
1480 # make mrproper  Delete the current configura    1333 # make mrproper  Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files,     1334 # make distclean Remove editor backup files, patch leftover files and the like
1482                                                  1335 
1483 # Directories & files removed with 'make clea    1336 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1337 CLEAN_DIRS  += $(MODVERDIR)
1485                modules.builtin modules.builti << 
1486                compile_commands.json rust/tes << 
1487                rust-project.json .vmlinux.obj << 
1488                                                  1338 
1489 # Directories & files removed with 'make mrpr    1339 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1340 MRPROPER_DIRS  += include/config usr/include include/generated          \
1491                   arch/$(SRCARCH)/include/gen !! 1341                   arch/*/include/generated .tmp_objdiff
1492                   debian snap tar-install PKG !! 1342 MRPROPER_FILES += .config .config.old .version \
1493                   .config .config.old .versio !! 1343                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1494                   Module.symvers \            !! 1344                   signing_key.pem signing_key.priv signing_key.x509     \
1495                   certs/signing_key.pem \     !! 1345                   x509.genkey extra_certificates signing_key.x509.keyid \
1496                   certs/x509.genkey \         !! 1346                   signing_key.x509.signer vmlinux-gdb.py
1497                   vmlinux-gdb.py \            << 
1498                   rpmbuild \                  << 
1499                   rust/libmacros.so           << 
1500                                                  1347 
1501 # clean - Delete most, but leave enough to bu    1348 # clean - Delete most, but leave enough to build external modules
1502 #                                                1349 #
1503 clean: private rm-files := $(CLEAN_FILES)     !! 1350 clean: rm-dirs  := $(CLEAN_DIRS)
                                                   >> 1351 clean: rm-files := $(CLEAN_FILES)
                                                   >> 1352 clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1504                                                  1353 
1505 PHONY += archclean vmlinuxclean               !! 1354 PHONY += $(clean-dirs) clean archclean vmlinuxclean
                                                   >> 1355 $(clean-dirs):
                                                   >> 1356         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1506                                                  1357 
1507 vmlinuxclean:                                    1358 vmlinuxclean:
1508         $(Q)$(CONFIG_SHELL) $(srctree)/script    1359         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1360         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510                                                  1361 
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1362 clean: archclean vmlinuxclean
1512                                                  1363 
1513 # mrproper - Delete all generated files, incl    1364 # mrproper - Delete all generated files, including .config
1514 #                                                1365 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1366 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
                                                   >> 1367 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs      := $(addprefix _mrproper_,    1368 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1517                                                  1369 
1518 PHONY += $(mrproper-dirs) mrproper            !! 1370 PHONY += $(mrproper-dirs) mrproper archmrproper
1519 $(mrproper-dirs):                                1371 $(mrproper-dirs):
1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1372         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521                                                  1373 
1522 mrproper: clean $(mrproper-dirs)              !! 1374 mrproper: clean archmrproper $(mrproper-dirs)
                                                   >> 1375         $(call cmd,rmdirs)
1523         $(call cmd,rmfiles)                      1376         $(call cmd,rmfiles)
1524         @find . $(RCS_FIND_IGNORE) \          << 
1525                 \( -name '*.rmeta' \) \       << 
1526                 -type f -print | xargs rm -f  << 
1527                                                  1377 
1528 # distclean                                      1378 # distclean
1529 #                                                1379 #
1530 PHONY += distclean                               1380 PHONY += distclean
1531                                                  1381 
1532 distclean: mrproper                              1382 distclean: mrproper
1533         @find . $(RCS_FIND_IGNORE) \          !! 1383         @find $(srctree) $(RCS_FIND_IGNORE) \
1534                 \( -name '*.orig' -o -name '*    1384                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535                 -o -name '*.bak' -o -name '#*    1385                 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536                 -o -name 'core' -o -name tags !! 1386                 -o -name 'core' \) \
1537                 -o -name GPATH -o -name GRTAG << 
1538                 -type f -print | xargs rm -f     1387                 -type f -print | xargs rm -f
1539                                                  1388 
1540                                                  1389 
1541 # Packaging of the kernel to various formats     1390 # Packaging of the kernel to various formats
1542 # -------------------------------------------    1391 # ---------------------------------------------------------------------------
                                                   >> 1392 # rpm target kept for backward compatibility
                                                   >> 1393 package-dir     := scripts/package
1543                                                  1394 
1544 %src-pkg: FORCE                                  1395 %src-pkg: FORCE
1545         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1396         $(Q)$(MAKE) $(build)=$(package-dir) $@
1546 %pkg: include/config/kernel.release FORCE        1397 %pkg: include/config/kernel.release FORCE
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1398         $(Q)$(MAKE) $(build)=$(package-dir) $@
                                                   >> 1399 rpm: rpm-pkg
                                                   >> 1400         @echo "  WARNING: \"rpm\" target will be removed after Linux 4.18"
                                                   >> 1401         @echo "           Please use \"rpm-pkg\" instead."
                                                   >> 1402 
1548                                                  1403 
1549 # Brief documentation of the typical targets     1404 # Brief documentation of the typical targets used
1550 # -------------------------------------------    1405 # ---------------------------------------------------------------------------
1551                                                  1406 
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC    1407 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards)))            1408 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc    1409 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/=    1410 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556                                                  1411 
1557 PHONY += help                                    1412 PHONY += help
1558 help:                                            1413 help:
1559         @echo  'Cleaning targets:'               1414         @echo  'Cleaning targets:'
1560         @echo  '  clean           - Remove mo    1415         @echo  '  clean           - Remove most generated files but keep the config and'
1561         @echo  '                    enough bu    1416         @echo  '                    enough build support to build external modules'
1562         @echo  '  mrproper        - Remove al    1417         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1563         @echo  '  distclean       - mrproper     1418         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1564         @echo  ''                                1419         @echo  ''
                                                   >> 1420         @echo  'Configuration targets:'
1565         @$(MAKE) -f $(srctree)/scripts/kconfi    1421         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566         @echo  ''                                1422         @echo  ''
1567         @echo  'Other generic targets:'          1423         @echo  'Other generic targets:'
1568         @echo  '  all             - Build all    1424         @echo  '  all             - Build all targets marked with [*]'
1569         @echo  '* vmlinux         - Build the    1425         @echo  '* vmlinux         - Build the bare kernel'
1570         @echo  '* modules         - Build all    1426         @echo  '* modules         - Build all modules'
1571         @echo  '  modules_install - Install a    1427         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572         @echo  '  vdso_install    - Install u << 
1573         @echo  '  dir/            - Build all    1428         @echo  '  dir/            - Build all files in dir and below'
1574         @echo  '  dir/file.[ois]  - Build spe    1429         @echo  '  dir/file.[ois]  - Build specified target only'
1575         @echo  '  dir/file.ll     - Build the    1430         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1576         @echo  '                    (requires    1431         @echo  '                    (requires compiler support for LLVM assembly generation)'
1577         @echo  '  dir/file.lst    - Build spe    1432         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1578         @echo  '                    (requires    1433         @echo  '                    (requires a recent binutils and recent build (System.map))'
1579         @echo  '  dir/file.ko     - Build mod    1434         @echo  '  dir/file.ko     - Build module including final link'
1580         @echo  '  modules_prepare - Set up fo    1435         @echo  '  modules_prepare - Set up for building external modules'
1581         @echo  '  tags/TAGS       - Generate     1436         @echo  '  tags/TAGS       - Generate tags file for editors'
1582         @echo  '  cscope          - Generate     1437         @echo  '  cscope          - Generate cscope index'
1583         @echo  '  gtags           - Generate     1438         @echo  '  gtags           - Generate GNU GLOBAL index'
1584         @echo  '  kernelrelease   - Output th    1439         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1585         @echo  '  kernelversion   - Output th    1440         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1586         @echo  '  image_name      - Output th    1441         @echo  '  image_name      - Output the image name (use with make -s)'
1587         @echo  '  headers_install - Install s    1442         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588          echo  '                    (default:    1443          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1589          echo  ''                                1444          echo  ''
1590         @echo  'Static analysers:'               1445         @echo  'Static analysers:'
1591         @echo  '  checkstack      - Generate  !! 1446         @echo  '  checkstack      - Generate a list of stack hogs'
1592         @echo  '                    with a st !! 1447         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1593         @echo  '  versioncheck    - Sanity ch    1448         @echo  '  versioncheck    - Sanity check on version.h usage'
1594         @echo  '  includecheck    - Check for    1449         @echo  '  includecheck    - Check for duplicate included header files'
1595         @echo  '  export_report   - List the     1450         @echo  '  export_report   - List the usages of all exported symbols'
                                                   >> 1451         @echo  '  headers_check   - Sanity check on exported headers'
1596         @echo  '  headerdep       - Detect in    1452         @echo  '  headerdep       - Detect inclusion cycles in headers'
1597         @echo  '  coccicheck      - Check wit    1453         @echo  '  coccicheck      - Check with Coccinelle'
1598         @echo  '  clang-analyzer  - Check wit << 
1599         @echo  '  clang-tidy      - Check wit << 
1600         @echo  ''                             << 
1601         @echo  'Tools:'                       << 
1602         @echo  '  nsdeps          - Generate  << 
1603         @echo  ''                                1454         @echo  ''
1604         @echo  'Kernel selftest:'                1455         @echo  'Kernel selftest:'
1605         @echo  '  kselftest         - Build a !! 1456         @echo  '  kselftest       - Build and run kernel selftest (run as root)'
1606         @echo  '                      Build,  !! 1457         @echo  '                    Build, install, and boot kernel before'
1607         @echo  '                      running !! 1458         @echo  '                    running kselftest on it'
1608         @echo  '                      Run as  !! 1459         @echo  '  kselftest-clean - Remove all generated kselftest files'
1609         @echo  '  kselftest-all     - Build k !! 1460         @echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
1610         @echo  '  kselftest-install - Build a !! 1461         @echo  '                    .config.'
1611         @echo  '  kselftest-clean   - Remove  << 
1612         @echo  '  kselftest-merge   - Merge a << 
1613         @echo  '                      kselfte << 
1614         @echo  ''                             << 
1615         @echo  'Rust targets:'                << 
1616         @echo  '  rustavailable   - Checks wh << 
1617         @echo  '                    available << 
1618         @echo  '  rustfmt         - Reformat  << 
1619         @echo  '  rustfmtcheck    - Checks if << 
1620         @echo  '                    is format << 
1621         @echo  '  rustdoc         - Generate  << 
1622         @echo  '                    (requires << 
1623         @echo  '  rusttest        - Runs the  << 
1624         @echo  '                    (requires << 
1625         @echo  '  rust-analyzer   - Generate  << 
1626         @echo  '                    (requires << 
1627         @echo  '  dir/file.[os]   - Build spe << 
1628         @echo  '  dir/file.rsi    - Build mac << 
1629         @echo  '                    Run with  << 
1630         @echo  '                    The outpu << 
1631         @echo  '  dir/file.ll     - Build the << 
1632         @echo  ''                                1462         @echo  ''
1633         @$(if $(dtstree), \                   << 
1634                 echo 'Devicetree:'; \         << 
1635                 echo '* dtbs               -  << 
1636                 echo '  dtbs_install       -  << 
1637                 echo '  dt_binding_check   -  << 
1638                 echo '  dt_binding_schema  -  << 
1639                 echo '  dtbs_check         -  << 
1640                 echo '')                      << 
1641                                               << 
1642         @echo 'Userspace tools targets:'         1463         @echo 'Userspace tools targets:'
1643         @echo '  use "make tools/help"'          1464         @echo '  use "make tools/help"'
1644         @echo '  or  "cd tools; make help"'      1465         @echo '  or  "cd tools; make help"'
1645         @echo  ''                                1466         @echo  ''
1646         @echo  'Kernel packaging:'               1467         @echo  'Kernel packaging:'
1647         @$(MAKE) -f $(srctree)/scripts/Makefi !! 1468         @$(MAKE) $(build)=$(package-dir) help
1648         @echo  ''                                1469         @echo  ''
1649         @echo  'Documentation targets:'          1470         @echo  'Documentation targets:'
1650         @$(MAKE) -f $(srctree)/Documentation/    1471         @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651         @echo  ''                                1472         @echo  ''
1652         @echo  'Architecture-specific targets !! 1473         @echo  'Architecture specific targets ($(SRCARCH)):'
1653         @$(or $(archhelp),\                   !! 1474         @$(if $(archhelp),$(archhelp),\
1654                 echo '  No architecture-speci !! 1475                 echo '  No architecture specific help defined for $(SRCARCH)')
1655         @echo  ''                                1476         @echo  ''
1656         @$(if $(boards), \                       1477         @$(if $(boards), \
1657                 $(foreach b, $(boards), \        1478                 $(foreach b, $(boards), \
1658                 printf "  %-27s - Build for % !! 1479                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659                 echo '')                         1480                 echo '')
1660         @$(if $(board-dirs), \                   1481         @$(if $(board-dirs), \
1661                 $(foreach b, $(board-dirs), \    1482                 $(foreach b, $(board-dirs), \
1662                 printf "  %-16s - Show %s-spe    1483                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663                 printf "  %-16s - Show all of    1484                 printf "  %-16s - Show all of the above\\n" help-boards; \
1664                 echo '')                         1485                 echo '')
1665                                                  1486 
1666         @echo  '  make V=n   [targets] 1: ver !! 1487         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667         @echo  '                       2: giv !! 1488         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1668         @echo  '                       V=1 an << 
1669         @echo  '  make O=dir [targets] Locate    1489         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1670         @echo  '  make C=1   [targets] Check  !! 1490         @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1671         @echo  '                       (spars << 
1672         @echo  '  make C=2   [targets] Force     1491         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1673         @echo  '  make RECORDMCOUNT_WARN=1 [t    1492         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674         @echo  '  make W=n   [targets] Enable !! 1493         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1675         @echo  '                1: warnings w    1494         @echo  '                1: warnings which may be relevant and do not occur too often'
1676         @echo  '                2: warnings w    1495         @echo  '                2: warnings which occur quite often but may still be relevant'
1677         @echo  '                3: more obscu    1496         @echo  '                3: more obscure warnings, can most likely be ignored'
1678         @echo  '                c: extra chec << 
1679         @echo  '                e: warnings a << 
1680         @echo  '                Multiple leve    1497         @echo  '                Multiple levels can be combined with W=12 or W=123'
1681         @$(if $(dtstree), \                   << 
1682                 echo '  make CHECK_DTBS=1 [ta << 
1683                 echo '         This can be ap << 
1684                 )                             << 
1685         @echo  ''                                1498         @echo  ''
1686         @echo  'Execute "make" or "make all"     1499         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1687         @echo  'For further info see the ./RE    1500         @echo  'For further info see the ./README file'
1688                                                  1501 
1689                                                  1502 
1690 help-board-dirs := $(addprefix help-,$(board-    1503 help-board-dirs := $(addprefix help-,$(board-dirs))
1691                                                  1504 
1692 help-boards: $(help-board-dirs)                  1505 help-boards: $(help-board-dirs)
1693                                                  1506 
1694 boards-per-dir = $(sort $(notdir $(wildcard $    1507 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695                                                  1508 
1696 $(help-board-dirs): help-%:                      1509 $(help-board-dirs): help-%:
1697         @echo  'Architecture-specific targets !! 1510         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1698         @$(if $(boards-per-dir), \               1511         @$(if $(boards-per-dir), \
1699                 $(foreach b, $(boards-per-dir    1512                 $(foreach b, $(boards-per-dir), \
1700                 printf "  %-24s - Build for %    1513                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701                 echo '')                         1514                 echo '')
1702                                                  1515 
1703                                                  1516 
1704 # Documentation targets                          1517 # Documentation targets
1705 # -------------------------------------------    1518 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html    1519 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707                linkcheckdocs dochelp refcheck !! 1520                linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS)                          1521 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS):                               !! 1522 $(DOC_TARGETS): scripts_basic FORCE
1710         $(Q)$(MAKE) $(build)=Documentation $@    1523         $(Q)$(MAKE) $(build)=Documentation $@
1711                                                  1524 
1712                                               << 
1713 # Rust targets                                << 
1714 # ------------------------------------------- << 
1715                                               << 
1716 # "Is Rust available?" target                 << 
1717 PHONY += rustavailable                        << 
1718 rustavailable:                                << 
1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1720                                               << 
1721 # Documentation target                        << 
1722 #                                             << 
1723 # Using the singular to avoid running afoul o << 
1724 PHONY += rustdoc                              << 
1725 rustdoc: prepare                              << 
1726         $(Q)$(MAKE) $(build)=rust $@          << 
1727                                               << 
1728 # Testing target                              << 
1729 PHONY += rusttest                             << 
1730 rusttest: prepare                             << 
1731         $(Q)$(MAKE) $(build)=rust $@          << 
1732                                               << 
1733 # Formatting targets                          << 
1734 PHONY += rustfmt rustfmtcheck                 << 
1735                                               << 
1736 # We skip `rust/alloc` since we want to minim << 
1737 #                                             << 
1738 # We match using absolute paths since `find`  << 
1739 # when matching, which is a problem when e.g. << 
1740 # We `grep` afterwards in order to remove the << 
1741 rustfmt:                                      << 
1742         $(Q)find $(abs_srctree) -type f -name << 
1743                 -o -path $(abs_srctree)/rust/ << 
1744                 -o -path $(abs_objtree)/rust/ << 
1745                 | grep -Fv $(abs_srctree)/rus << 
1746                 | grep -Fv $(abs_objtree)/rus << 
1747                 | grep -Fv generated \        << 
1748                 | xargs $(RUSTFMT) $(rustfmt_ << 
1749                                               << 
1750 rustfmtcheck: rustfmt_flags = --check         << 
1751 rustfmtcheck: rustfmt                         << 
1752                                               << 
1753 # Misc                                        << 
1754 # ------------------------------------------- << 
1755                                               << 
1756 PHONY += misc-check                           << 
1757 misc-check:                                   << 
1758         $(Q)$(srctree)/scripts/misc-check     << 
1759                                               << 
1760 all: misc-check                               << 
1761                                               << 
1762 PHONY += scripts_gdb                          << 
1763 scripts_gdb: prepare0                         << 
1764         $(Q)$(MAKE) $(build)=scripts/gdb      << 
1765         $(Q)ln -fsn $(abspath $(srctree)/scri << 
1766                                               << 
1767 ifdef CONFIG_GDB_SCRIPTS                      << 
1768 all: scripts_gdb                              << 
1769 endif                                         << 
1770                                               << 
1771 else # KBUILD_EXTMOD                             1525 else # KBUILD_EXTMOD
1772                                                  1526 
1773 filechk_kernel.release = echo $(KERNELRELEASE << 
1774                                               << 
1775 ###                                              1527 ###
1776 # External module support.                       1528 # External module support.
1777 # When building external modules the kernel u    1529 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma    1530 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If     1531 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands  !! 1532 # in the basis kernel ordinary make commands (without M=...) must
                                                   >> 1533 # be used.
                                                   >> 1534 #
                                                   >> 1535 # The following are the only valid targets when building external
                                                   >> 1536 # modules.
                                                   >> 1537 # make M=dir clean     Delete all automatically generated files
                                                   >> 1538 # make M=dir modules   Make all modules in specified dir
                                                   >> 1539 # make M=dir           Same as 'make M=dir modules'
                                                   >> 1540 # make M=dir modules_install
                                                   >> 1541 #                      Install the modules built in the module directory
                                                   >> 1542 #                      Assumes install directory is already created
1781                                                  1543 
1782 # We are always building only modules.        !! 1544 # We are always building modules
1783 KBUILD_BUILTIN :=                             << 
1784 KBUILD_MODULES := 1                              1545 KBUILD_MODULES := 1
                                                   >> 1546 PHONY += crmodverdir
                                                   >> 1547 crmodverdir:
                                                   >> 1548         $(cmd_crmodverdir)
                                                   >> 1549 
                                                   >> 1550 PHONY += $(objtree)/Module.symvers
                                                   >> 1551 $(objtree)/Module.symvers:
                                                   >> 1552         @test -e $(objtree)/Module.symvers || ( \
                                                   >> 1553         echo; \
                                                   >> 1554         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
                                                   >> 1555         echo "           is missing; modules will have no dependencies and modversions."; \
                                                   >> 1556         echo )
                                                   >> 1557 
                                                   >> 1558 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
                                                   >> 1559 PHONY += $(module-dirs) modules
                                                   >> 1560 $(module-dirs): crmodverdir $(objtree)/Module.symvers
                                                   >> 1561         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1785                                                  1562 
1786 build-dir := $(KBUILD_EXTMOD)                 !! 1563 modules: $(module-dirs)
                                                   >> 1564         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1565         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1787                                                  1566 
1788 compile_commands.json: $(extmod_prefix)compil !! 1567 PHONY += modules_install
1789 PHONY += compile_commands.json                !! 1568 modules_install: _emodinst_ _emodinst_post
1790                                                  1569 
1791 clean-dirs := $(KBUILD_EXTMOD)                !! 1570 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1571 PHONY += _emodinst_
1793         $(KBUILD_EXTMOD)/compile_commands.jso !! 1572 _emodinst_:
1794                                               !! 1573         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1795 PHONY += prepare                              !! 1574         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1796 # now expand this into a simple variable to r !! 1575 
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1576 PHONY += _emodinst_post
1798 prepare:                                      !! 1577 _emodinst_post: _emodinst_
1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1578         $(call cmd,depmod)
1800                 echo >&2 "warning: the compil !! 1579 
1801                 echo >&2 "  The kernel was bu !! 1580 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1802                 echo >&2 "  You are using:    !! 1581 
1803         fi                                    !! 1582 PHONY += $(clean-dirs) clean
                                                   >> 1583 $(clean-dirs):
                                                   >> 1584         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
                                                   >> 1585 
                                                   >> 1586 clean:  rm-dirs := $(MODVERDIR)
                                                   >> 1587 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1804                                                  1588 
1805 PHONY += help                                    1589 PHONY += help
1806 help:                                            1590 help:
1807         @echo  '  Building external modules.'    1591         @echo  '  Building external modules.'
1808         @echo  '  Syntax: make -C path/to/ker    1592         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1809         @echo  ''                                1593         @echo  ''
1810         @echo  '  modules         - default t    1594         @echo  '  modules         - default target, build the module(s)'
1811         @echo  '  modules_install - install t    1595         @echo  '  modules_install - install the module'
1812         @echo  '  clean           - remove ge    1596         @echo  '  clean           - remove generated files in module directory only'
1813         @echo  '  rust-analyzer   - generate  << 
1814         @echo  ''                                1597         @echo  ''
1815                                                  1598 
1816 ifndef CONFIG_MODULES                         !! 1599 # Dummies...
1817 modules modules_install: __external_modules_e !! 1600 PHONY += prepare scripts
1818 __external_modules_error:                     !! 1601 prepare: ;
1819         @echo >&2 '***'                       !! 1602 scripts: ;
1820         @echo >&2 '*** The present kernel dis << 
1821         @echo >&2 '*** You cannot build or in << 
1822         @echo >&2 '***'                       << 
1823         @false                                << 
1824 endif                                         << 
1825                                               << 
1826 endif # KBUILD_EXTMOD                            1603 endif # KBUILD_EXTMOD
1827                                                  1604 
1828 # ------------------------------------------- << 
1829 # Modules                                     << 
1830                                               << 
1831 PHONY += modules modules_install modules_sign << 
1832                                               << 
1833 modules_install:                              << 
1834         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1835         sign-only=$(if $(filter modules_insta << 
1836                                               << 
1837 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1838 # modules_sign is a subset of modules_install << 
1839 # 'make modules_install modules_sign' is equi << 
1840 modules_sign: modules_install                 << 
1841         @:                                    << 
1842 else                                          << 
1843 modules_sign:                                 << 
1844         @echo >&2 '***'                       << 
1845         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1846         @echo >&2 '***'                       << 
1847         @false                                << 
1848 endif                                         << 
1849                                               << 
1850 ifdef CONFIG_MODULES                          << 
1851                                               << 
1852 $(MODORDER): $(build-dir)                     << 
1853         @:                                    << 
1854                                               << 
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1856 # This is solely useful to speed up test comp << 
1857 modules: modpost                              << 
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1859         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1860 endif                                         << 
1861                                               << 
1862 PHONY += modules_check                        << 
1863 modules_check: $(MODORDER)                    << 
1864         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1865                                               << 
1866 else # CONFIG_MODULES                         << 
1867                                               << 
1868 modules:                                      << 
1869         @:                                    << 
1870                                               << 
1871 KBUILD_MODULES :=                             << 
1872                                               << 
1873 endif # CONFIG_MODULES                        << 
1874                                               << 
1875 PHONY += modpost                              << 
1876 modpost: $(if $(single-build),, $(if $(KBUILD << 
1877          $(if $(KBUILD_MODULES), modules_chec << 
1878         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1879                                               << 
1880 # Single targets                              << 
1881 # ------------------------------------------- << 
1882 # To build individual files in subdirectories << 
1883 #                                             << 
1884 #   make foo/bar/baz.s                        << 
1885 #                                             << 
1886 # The supported suffixes for single-target ar << 
1887 #                                             << 
1888 # To build only under specific subdirectories << 
1889 #                                             << 
1890 #   make foo/bar/baz/                         << 
1891                                               << 
1892 ifdef single-build                            << 
1893                                               << 
1894 # .ko is special because modpost is needed    << 
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG << 
1896 single-no-ko := $(filter-out $(single-ko), $( << 
1897                 $(foreach x, o mod, $(patsubs << 
1898                                               << 
1899 $(single-ko): single_modules                  << 
1900         @:                                    << 
1901 $(single-no-ko): $(build-dir)                 << 
1902         @:                                    << 
1903                                               << 
1904 # Remove MODORDER when done because it is not << 
1905 PHONY += single_modules                       << 
1906 single_modules: $(single-no-ko) modules_prepa << 
1907         $(Q){ $(foreach m, $(single-ko), echo << 
1908         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1910         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1911 endif                                         << 
1912         $(Q)rm -f $(MODORDER)                 << 
1913                                               << 
1914 single-goals := $(addprefix $(build-dir)/, $( << 
1915                                               << 
1916 KBUILD_MODULES := 1                           << 
1917                                               << 
1918 endif                                         << 
1919                                               << 
1920 # Preset locale variables to speed up the bui << 
1921 # tweaks to this spot to avoid wrong language << 
1922 # make menuconfig etc.                        << 
1923 # Error messages still appears in the origina << 
1924 PHONY += $(build-dir)                         << 
1925 $(build-dir): prepare                         << 
1926         $(Q)$(MAKE) $(build)=$@ need-builtin= << 
1927                                               << 
1928 clean-dirs := $(addprefix _clean_, $(clean-di << 
1929 PHONY += $(clean-dirs) clean                  << 
1930 $(clean-dirs):                                << 
1931         $(Q)$(MAKE) $(clean)=$(patsubst _clea << 
1932                                               << 
1933 clean: $(clean-dirs)                             1605 clean: $(clean-dirs)
                                                   >> 1606         $(call cmd,rmdirs)
1934         $(call cmd,rmfiles)                      1607         $(call cmd,rmfiles)
1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1608         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936                 \( -name '*.[aios]' -o -name  !! 1609                 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937                 -o -name '*.ko.*' \           !! 1610                 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
1938                 -o -name '*.dtb' -o -name '*. << 
1939                 -o -name '*.dtb.S' -o -name ' << 
1940                 -o -name '*.dt.yaml' -o -name << 
1941                 -o -name '*.dwo' -o -name '*.    1611                 -o -name '*.dwo' -o -name '*.lst' \
1942                 -o -name '*.su' -o -name '*.m !! 1612                 -o -name '*.su'  \
1943                 -o -name '.*.d' -o -name '.*.    1613                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944                 -o -name '*.lex.c' -o -name ' << 
1945                 -o -name '*.asn1.[ch]' \      << 
1946                 -o -name '*.symtypes' -o -nam    1614                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1615                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
                                                   >> 1616                 -o -name .cache.mk \
1947                 -o -name '*.c.[012]*.*' \        1617                 -o -name '*.c.[012]*.*' \
1948                 -o -name '*.ll' \                1618                 -o -name '*.ll' \
1949                 -o -name '*.gcno' \           !! 1619                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950                 -o -name '*.*.symversions' \) << 
1951                 -o -name '.tmp_*' -print \    << 
1952                 | xargs rm -rf                << 
1953                                                  1620 
1954 # Generate tags for editors                      1621 # Generate tags for editors
1955 # -------------------------------------------    1622 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN     $@                      1623 quiet_cmd_tags = GEN     $@
1957       cmd_tags = $(BASH) $(srctree)/scripts/t !! 1624       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1958                                                  1625 
1959 tags TAGS cscope gtags: FORCE                    1626 tags TAGS cscope gtags: FORCE
1960         $(call cmd,tags)                         1627         $(call cmd,tags)
1961                                                  1628 
1962 # Generate rust-project.json (a file that des << 
1963 # Rust projects) for rust-analyzer (an implem << 
1964 # Protocol).                                  << 
1965 PHONY += rust-analyzer                        << 
1966 rust-analyzer:                                << 
1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1968         $(Q)$(MAKE) $(build)=rust $@          << 
1969                                               << 
1970 # Script to generate missing namespace depend << 
1971 # ------------------------------------------- << 
1972                                               << 
1973 PHONY += nsdeps                               << 
1974 nsdeps: export KBUILD_NSDEPS=1                << 
1975 nsdeps: modules                               << 
1976         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1977                                               << 
1978 # Clang Tooling                               << 
1979 # ------------------------------------------- << 
1980                                               << 
1981 quiet_cmd_gen_compile_commands = GEN     $@   << 
1982       cmd_gen_compile_commands = $(PYTHON3) $ << 
1983                                               << 
1984 $(extmod_prefix)compile_commands.json: $(srct << 
1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 
1986         $(if $(CONFIG_MODULES), $(MODORDER))  << 
1987         $(call if_changed,gen_compile_command << 
1988                                               << 
1989 targets += $(extmod_prefix)compile_commands.j << 
1990                                               << 
1991 PHONY += clang-tidy clang-analyzer            << 
1992                                               << 
1993 ifdef CONFIG_CC_IS_CLANG                      << 
1994 quiet_cmd_clang_tools = CHECK   $<            << 
1995       cmd_clang_tools = $(PYTHON3) $(srctree) << 
1996                                               << 
1997 clang-tidy clang-analyzer: $(extmod_prefix)co << 
1998         $(call cmd,clang_tools)               << 
1999 else                                          << 
2000 clang-tidy clang-analyzer:                    << 
2001         @echo "$@ requires CC=clang" >&2      << 
2002         @false                                << 
2003 endif                                         << 
2004                                               << 
2005 # Scripts to check various things for consist    1629 # Scripts to check various things for consistency
2006 # -------------------------------------------    1630 # ---------------------------------------------------------------------------
2007                                                  1631 
2008 PHONY += includecheck versioncheck coccicheck !! 1632 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2009                                                  1633 
2010 includecheck:                                    1634 includecheck:
2011         find $(srctree)/* $(RCS_FIND_IGNORE)     1635         find $(srctree)/* $(RCS_FIND_IGNORE) \
2012                 -name '*.[hcS]' -type f -prin    1636                 -name '*.[hcS]' -type f -print | sort \
2013                 | xargs $(PERL) -w $(srctree)    1637                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014                                                  1638 
2015 versioncheck:                                    1639 versioncheck:
2016         find $(srctree)/* $(RCS_FIND_IGNORE)     1640         find $(srctree)/* $(RCS_FIND_IGNORE) \
2017                 -name '*.[hcS]' -type f -prin    1641                 -name '*.[hcS]' -type f -print | sort \
2018                 | xargs $(PERL) -w $(srctree)    1642                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019                                                  1643 
2020 coccicheck:                                      1644 coccicheck:
2021         $(Q)$(BASH) $(srctree)/scripts/$@     !! 1645         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
                                                   >> 1646 
                                                   >> 1647 namespacecheck:
                                                   >> 1648         $(PERL) $(srctree)/scripts/namespace.pl
2022                                                  1649 
2023 export_report:                                   1650 export_report:
2024         $(PERL) $(srctree)/scripts/export_rep    1651         $(PERL) $(srctree)/scripts/export_report.pl
2025                                                  1652 
                                                   >> 1653 endif #ifeq ($(config-targets),1)
                                                   >> 1654 endif #ifeq ($(mixed-targets),1)
                                                   >> 1655 
2026 PHONY += checkstack kernelrelease kernelversi    1656 PHONY += checkstack kernelrelease kernelversion image_name
2027                                                  1657 
2028 # UML needs a little special treatment here.     1658 # UML needs a little special treatment here.  It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch    1659 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2030 # else wants $(ARCH), including people doing     1660 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here.             1661 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um)                               1662 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH)                    1663 CHECKSTACK_ARCH := $(SUBARCH)
2034 else                                             1664 else
2035 CHECKSTACK_ARCH := $(ARCH)                       1665 CHECKSTACK_ARCH := $(ARCH)
2036 endif                                            1666 endif
2037 MINSTACKSIZE    ?= 100                        << 
2038 checkstack:                                      1667 checkstack:
2039         $(OBJDUMP) -d vmlinux $$(find . -name    1668         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040         $(PERL) $(srctree)/scripts/checkstack !! 1669         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041                                                  1670 
2042 kernelrelease:                                   1671 kernelrelease:
2043         @$(filechk_kernel.release)            !! 1672         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044                                                  1673 
2045 kernelversion:                                   1674 kernelversion:
2046         @echo $(KERNELVERSION)                   1675         @echo $(KERNELVERSION)
2047                                                  1676 
2048 image_name:                                      1677 image_name:
2049         @echo $(KBUILD_IMAGE)                    1678         @echo $(KBUILD_IMAGE)
2050                                                  1679 
2051 PHONY += run-command                          !! 1680 # Clear a bunch of variables before executing the submake
2052 run-command:                                  !! 1681 tools/: FORCE
2053         $(Q)$(KBUILD_RUN_COMMAND)             !! 1682         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1683         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
                                                   >> 1684 
                                                   >> 1685 tools/%: FORCE
                                                   >> 1686         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1687         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
                                                   >> 1688 
                                                   >> 1689 # Single targets
                                                   >> 1690 # ---------------------------------------------------------------------------
                                                   >> 1691 # Single targets are compatible with:
                                                   >> 1692 # - build with mixed source and output
                                                   >> 1693 # - build with separate output dir 'make O=...'
                                                   >> 1694 # - external modules
                                                   >> 1695 #
                                                   >> 1696 #  target-dir => where to store outputfile
                                                   >> 1697 #  build-dir  => directory in kernel source tree to use
                                                   >> 1698 
                                                   >> 1699 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1700         build-dir  = $(patsubst %/,%,$(dir $@))
                                                   >> 1701         target-dir = $(dir $@)
                                                   >> 1702 else
                                                   >> 1703         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
                                                   >> 1704         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
                                                   >> 1705         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
                                                   >> 1706 endif
                                                   >> 1707 
                                                   >> 1708 %.s: %.c prepare scripts FORCE
                                                   >> 1709         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1710 %.i: %.c prepare scripts FORCE
                                                   >> 1711         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1712 %.o: %.c prepare scripts FORCE
                                                   >> 1713         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1714 %.lst: %.c prepare scripts FORCE
                                                   >> 1715         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1716 %.s: %.S prepare scripts FORCE
                                                   >> 1717         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1718 %.o: %.S prepare scripts FORCE
                                                   >> 1719         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1720 %.symtypes: %.c prepare scripts FORCE
                                                   >> 1721         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1722 %.ll: %.c prepare scripts FORCE
                                                   >> 1723         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1724 
                                                   >> 1725 # Modules
                                                   >> 1726 /: prepare scripts FORCE
                                                   >> 1727         $(cmd_crmodverdir)
                                                   >> 1728         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1729         $(build)=$(build-dir)
                                                   >> 1730 # Make sure the latest headers are built for Documentation
                                                   >> 1731 Documentation/ samples/: headers_install
                                                   >> 1732 %/: prepare scripts FORCE
                                                   >> 1733         $(cmd_crmodverdir)
                                                   >> 1734         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1735         $(build)=$(build-dir)
                                                   >> 1736 %.ko: prepare scripts FORCE
                                                   >> 1737         $(cmd_crmodverdir)
                                                   >> 1738         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
                                                   >> 1739         $(build)=$(build-dir) $(@:.ko=.o)
                                                   >> 1740         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1741 
                                                   >> 1742 # FIXME Should go into a make.lib or something
                                                   >> 1743 # ===========================================================================
                                                   >> 1744 
                                                   >> 1745 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
                                                   >> 1746       cmd_rmdirs = rm -rf $(rm-dirs)
2054                                                  1747 
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1748 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2056       cmd_rmfiles = rm -rf $(rm-files)        !! 1749       cmd_rmfiles = rm -f $(rm-files)
2057                                                  1750 
2058 # read saved command lines for existing targe !! 1751 # Run depmod only if we have System.map and depmod is executable
2059 existing-targets := $(wildcard $(sort $(targe !! 1752 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
                                                   >> 1753       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                                                   >> 1754                    $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
2060                                                  1755 
2061 -include $(foreach f,$(existing-targets),$(di !! 1756 # Create temporary dir for module support files
                                                   >> 1757 # clean it up only when building all modules
                                                   >> 1758 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                                                   >> 1759                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
                                                   >> 1760 
                                                   >> 1761 # read all saved command lines
                                                   >> 1762 
                                                   >> 1763 cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
                                                   >> 1764 
                                                   >> 1765 ifneq ($(cmd_files),)
                                                   >> 1766   $(cmd_files): ;       # Do not try to update included dependency files
                                                   >> 1767   include $(cmd_files)
                                                   >> 1768 endif
2062                                                  1769 
2063 endif # config-build                          !! 1770 endif   # skip-makefile
2064 endif # mixed-build                           << 
2065 endif # need-sub-make                         << 
2066                                                  1771 
2067 PHONY += FORCE                                   1772 PHONY += FORCE
2068 FORCE:                                           1773 FORCE:
2069                                                  1774 
2070 # Declare the contents of the PHONY variable  !! 1775 # Declare the contents of the .PHONY variable as phony.  We keep that
2071 # information in a variable so we can use it     1776 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY)                                 1777 .PHONY: $(PHONY)
                                                      

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